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2015创新设计(高中理科数学)题组训练4-4

thrift of excellent traditi onal a nd style lack dee p of understa ndi ng, one -si ded t hink i n now of good s ituation Xi a, economic sm ooth more fast devel opme nt, and reform made major progres s, a nd people living significantly improve , and s ocial t he care er made new pr ogr ess, no ne cessary always ha rd has, no a warene ss to Chi na als o ha s many poverty area, a nd al so has many poverty population of exists, m ore living impr ove ha s, more need ke ep hard of style . Thre e is not strictly honest. Total thought units i s a water se ctor, cle an s elf-dis cipline away from himself too far, no real pr oce ssing good living of impr ove and har d, and thrift excell ent tradi tional of relationshi p, no effective do comply with Constituti on a nd party of regulati ons must from I do up, no right mer cy g ood bitter Le, a nd wealt h of relati ons hip, no rig ht aware ness t o in comply with Constitution and party of regulations as pect s everyone ha s accountability. Four, f uture directi on a nd impr ovement meas ures 1, belief a nd faith, strengthe n party s pirit. One i s to firmly establi sh t he noble ideal s of struggl e for the i deals of communism, communist str uggle for life, ready t o sa crifice everyt hing for t he party a nd t he people. Se cond is t o conti nuously im prove the quality and standard of political, cons cienti ously study Deng Xi aopi ng the ory and "three re present s" important t hought a nd the scientific Outl ook on development, im plement t he party's basi c pr ogram for the pr imary stage of s ociali sm, adhere to t he corre ct politi cal orientation, maintai n hig hly consistent w ith the CPC Ce ntral Committee, is good at t heorie s of socialism wit h Chine se characteri stics t o ana lyze and s olve pr oblem s. Third, strengt heni ng the party s pirit and the w orld tra nsformation, per severance of the party Constitution, relive Party vows t o establish corre ct worl d Outlook, Outlook on life and the worl d, pra ctically em bodies i deals and be liefs into action, combi ne l ofty ideals a nd practi cal activitie s, transformi ng the obj ective w orld, actively participate i n the great pra ctice of buil ding s ocialism with Chi nese chara cteristics. 2, kee p the purpose i n concept, cha nging the styl e of work. First, kee p in mi nd that the pur po se of servi ng, a dhere to a ssumi ng power for the people, kee p in mind the people and care a bout pe ople, a nd t he joys a nd sorrows of the masse s, ... According to city dis cipli ne, and municipal organi zation Departme nt requireme nts, today we hel d "implement impl ementation independent Commissi on against corr upti on gui deli nes effective strengt heni ng led cadres style construction" topi c democratic life, main task i s cl ose conta ct thought, and work a ctual , control che ck distri ct Standi ng Committee team and the personal in im plementation independent Commissi on agai nst corr upti on guideli nes Shang exists of probl em, in-de pth carrie d out critici sm and self-criti cal, further clear re ctification dire ction and mea sures , effective enhanced cl ean politi cs of cons cious ness a nd i nitiative, firm set good of ruli ng image. Before t he meeting, t he way we take survey s soli cited a vie ws, combe d, related to team buil ding

第4讲

平面向量应用举例
基础巩固题组 (建议用时:40 分钟)

一、选择题 1.(2014· 邵阳模拟)已知 a=(1,sin2x),b=(2,sin 2x),其中 x∈(0,π).若|a· b| =|a||b|,则 tan x 的值等于 A.1 C. 3 解析 由|a· b|=|a||b|知,a∥b. B.-1 2 D. 2 ( ).

所以 sin 2x=2sin2x,即 2sin xcos x=2sin2x, 而 x∈(0,π), π 所以 sin x=cos x,即 x=4,故 tan x=1. 答案 A

2.(2014· 南昌模拟)若|a|=2sin 15° ,|b|=4cos 15° ,a 与 b 的夹角为 30° ,则 a· b 的值是 3 A. 2 C.2 3 解析 答案 B. 3 1 D.2 ( ).

3 3 a· b=|a||b|cos 30° =8sin 15° cos 15° × 2 =4×sin 30° × 2 = 3. B

→ → → π π 3. (2013· 哈尔滨模拟)函数 y=tan4x-2的部分图象如图所示,则(OA+OB)· AB= ( ).

proje ct work, cadres , cadre s sele ction and ot her as pects of a total of 19, furt her defined t he dire ction of rectificati on, enhancing the perti nence and effectivene ss of democrati c life. 能 鉴 生 高 提 步 一 歌 诗 代 2古 修 必 是 图 意 置 设 元 单 本 。 受 美 审 富 丰 得 获 力 魅 术 艺 悟 析 赏 行 进 品 作 对 面 方 等 巧 技 现 表 、 容 内 从 习 学 , 上 础 基 的 知 感 体 整 在

Good for thi s meeting, we requested t he Standing Committee of the munici pal party Committ ee, munici pal Secretary General Ta ng Wenjin, t he City Commissi on for disci pli ne inspe ction Standi ng Committee Ya ng Xu, Jiang Jixue, D eputy Direct or of the personnel office, a nd other lea ding comrade s prese nt gui dance all ows us to warm a ppla use for th eir welcome a nd tha nks!

Below, I first District Committee member of the 20XX team annua l democratic meeti ng implementati on of the corrective meas ures, a s well as mem ber of the team a nd of my own report gui delines for the im plementation of the indepe nde nt Comm ission against corr upti on stateme nt invited lea ders a nd comrade s criticis m. First, annual party on t he 20 XX team, M ember of democratic life acti on pl an impl ementation year 20 XX, distri ct

democrati c meeting a mem ber of the team on "study and practi ce t he s cientific Outl ook on devel opment" theme, find a pr oject supporting strong e nough, t he industry well e nough, urba n constructi on ma nagement leve l nee ds t o be im proved, liveli hood impr ovement needs to be strengt hened, district team itse lf, such as t he fiv e as pects . Year of 20 XX, w e find out t he probl ems menti one d above, based on act ual Shunqing construction and devel opme nt, conscie ntiously s um up improveme nts, a chievi ng sig nificant devel opment re sults and effectivenes s of their work. (A) highlight the project handle, mai ntain high gr owth of investment. A dhere to t he strategy as a Foundati on, carrying out proje cts to promote increased stamina im portant. One is t o increase t he inte nsity of proje cts towards. Actively s eek nati onal and provi nci al policy support, superi or special tra nsfer pay ments, a variety of a dditi onal i ncome will t op 7 00 million Yuan, a num ber of key infrastructure proj ects, l ivelihood proje cts, i ndustrial proje cts int o the cage. Second, i ncreasi ng the pr oject attra cts. T his year a total of 23 sig ned a major proj ect, of whi ch 14 billion proje ct, China Metall urgical group, vanke gr oup, G uang dong he ngda gr oup, Taiwan R uentex group, on the RI group, S henzhe n Kaisa, jife ng agricult ural machi ner y, Mer cede s-Be nz, A udi 4S store and ot her large e nterpri ses a nd proj ects have s ettled i n Shunqing. Third, strengt hen proj ect construction. Annua l impleme ntation focus pr oje ct 39 a , fixed as sets inve stment total w ill bre akthrough 12 billion yua n, created district y ilai history high, S outh door dam, and fiv e in shop ol d city tra nsformation, and Yi ng China industrial concentrated district construction, a nd city main r oad construction, a nd Nort heast steam Trade Ce nter, and modern farmers i ndustry Park, and vocational educati on city, and low rental, and als o ro om constr ucti on, a nd features blocks buil d, a nd farmers market transformati on, and "rural versi on" Street transformation, focus engine ering s peed up implementation, effectivene ss obviousl y. Expe cted to be achieved t his year, are a-wi de G DP 17 billion

thrift of excellent traditi onal a nd style lack dee p of understa ndi ng, one -si ded t hink i n now of good s ituation Xi a, economic sm ooth more fast devel opme nt, and reform made major progres s, a nd people living significantly improve , and s ocial t he care er made new pr ogr ess, no ne cessary always ha rd has, no a warene ss to Chi na als o ha s many poverty area, a nd al so has many poverty population of exists, m ore living impr ove ha s, more need ke ep hard of style . Thre e is not strictly honest. Total thought units i s a water se ctor, cle an s elf-dis cipline away from himself too far, no real pr oce ssing good living of impr ove and har d, and thrift excell ent tradi tional of relationshi p, no effective do comply with Constituti on a nd party of regulati ons must from I do up, no right mer cy g ood bitter Le, a nd wealt h of relati ons hip, no rig ht aware ness t o in comply with Constitution and party of regulations as pect s everyone ha s accountability. Four, f uture directi on a nd impr ovement meas ures 1, belief a nd faith, strengthe n party s pirit. One i s to firmly establi sh t he noble ideal s of struggl e for the i deals of communism, communist str uggle for life, ready t o sa crifice everyt hing for t he party a nd t he people. Se cond is t o conti nuously im prove the quality and standard of political, cons cienti ously study Deng Xi aopi ng the ory and "three re present s" important t hought a nd the scientific Outl ook on development, im plement t he party's basi c pr ogram for the pr imary stage of s ociali sm, adhere to t he corre ct politi cal orientation, maintai n hig hly consistent w ith the CPC Ce ntral Committee, is good at t heorie s of socialism wit h Chine se characteri stics t o ana lyze and s olve pr oblem s. Third, strengt heni ng the party s pirit and the w orld tra nsformation, per severance of the party Constitution, relive Party vows t o establish corre ct worl d Outlook, Outlook on life and the worl d, pra ctically em bodies i deals and be liefs into action, combi ne l ofty ideals a nd practi cal activitie s, transformi ng the obj ective w orld, actively participate i n the great pra ctice of buil ding s ocialism with Chi nese chara cteristics. 2, kee p the purpose i n concept, cha nging the styl e of work. First, kee p in mi nd that the pur po se of servi ng, a dhere to a ssumi ng power for the people, kee p in mind the people and care a bout pe ople, a nd t he joys a nd sorrows of the masse s, ... According to city dis cipli ne, and municipal organi zation Departme nt requireme nts, today we hel d "implement impl ementation independent Commissi on against corr upti on gui deli nes effective strengt heni ng led cadres style construction" topi c democratic life, main task i s cl ose conta ct thought, and work a ctual , control che ck distri ct Standi ng Committee team and the personal in im plementation independent Commissi on agai nst corr upti on guideli nes Shang exists of probl em, in-de pth carrie d out critici sm and self-criti cal, further clear re ctification dire ction and mea sures , effective enhanced cl ean politi cs of cons cious ness a nd i nitiative, firm set good of ruli ng image. Before t he meeting, t he way we take survey s soli cited a vie ws, combe d, related to team buil ding

A.4 C.1 解析

B.6 D.2 由条件可得 B(3,1),A(2,0),

→ → → → → → → → → ∴(OA+OB)· AB=(OA+OB)· (OB-OA)=OB2-OA2=10-4=6. 答案 B

4.已知|a|=2|b|,|b|≠0 且关于 x 的方程 x2+|a|x-a· b=0 有两相等实根,则向量 a 与 b 的夹角是 π A.-6 π C.3 解析 π B.-3 2π D. 3 由已知可得 Δ=|a|2+4a· b=0, ( ).

1 即 4|b|2+4×2|b|2cos θ=0,∴cos θ=-2, 2π 又∵0≤θ≤π,∴θ= 3 . 答案 D

5.(2014· 安庆二模)在△ABC 中,a,b,c 分别为角 A,B,C 所对应的三角形的 → → → 边长,若 4aBC+2bC A +3cAB=0,则 cos B= 11 A.-24 29 C.36 11 B.24 29 D.-36 ( ).

proje ct work, cadres , cadre s sele ction and ot her as pects of a total of 19, furt her defined t he dire ction of rectificati on, enhancing the perti nence and effectivene ss of democrati c life. 能 鉴 生 高 提 步 一 歌 诗 代 2古 修 必 是 图 意 置 设 元 单 本 。 受 美 审 富 丰 得 获 力 魅 术 艺 悟 析 赏 行 进 品 作 对 面 方 等 巧 技 现 表 、 容 内 从 习 学 , 上 础 基 的 知 感 体 整 在

Good for thi s meeting, we requested t he Standing Committee of the munici pal party Committee, munici pal Secretary General Ta ng Wenjin, t he City Commissi on for disci pli ne inspe ction Standi ng Committee Ya ng Xu, Jiang Jixue, D eputy Direct or of the personnel office, a nd other lea ding comrade s prese nt gui dance all ows us to warm a ppla use for their welcome a nd tha nks!

Below, I first District Committee member of the 20XX team annua l democratic meeti ng implementati on of the corrective meas ures, a s well as mem ber of the team a nd of my own report gui delines for the im plementation of the indepe nde nt Commission against corr upti on stateme nt invited lea ders a nd comrade s criticis m. First, annual party on t he 20 XX team, M ember of democratic life acti on pl an impl ementation year 20 XX, distri ct

democrati c meeting a mem ber of the team on "study and practi ce t he s cientific Outl ook on devel opment" theme, find a pr oject supporting strong e nough, t he industry well e nough, urba n constructi on ma nagement leve l nee ds t o be im proved, liveli hood impr ovement needs to be strengt hened, district t eam itse lf, such as t he five as pects . Year of 20 XX, w e find out t he probl ems menti one d above, based on act ual Shunqing construction and devel opme nt, conscie ntiously s um up improveme nts, a chievi ng sig nificant devel opment re sults and effectivenes s of their work. (A) highlight the project handle, mai ntain high gr owth of investment. A dhere to t he strategy as a Foundati on, carrying out proje cts to promote increased stamina im portant. One is t o increase t he inte nsity of proje cts towards. Actively s eek nati onal and provi nci al policy support, superi or special tra nsfer pay ments, a variety of a dditi onal i ncome will t op 7 00 million Yuan, a num ber of key infrastructure proj ects, l ivelihood proje cts, i ndustrial proje cts int o the cage. Second, i ncreasi ng the pr oject attra cts. T his year a total of 23 sig ned a major proj ect, of whi ch 14 billion proje ct, China Metall urgical group, vanke gr oup, G uang dong he ngda gr oup, Taiwan Ruentex group, on the RI group, S henzhe n Kaisa, jife ng agricult ural machi ner y, Mer cede s-Be nz, A udi 4S store and ot her large e nterpri ses a nd proj ects have s ettled i n Shunqing. Third, strengt hen proj ect construction. Annua l impleme ntation focus pr oje ct 39 a , fixed as sets inve stment total w ill bre akthrough 12 billion yua n, created district y ilai history hi gh, S outh door dam, and five in shop ol d city tra nsformation, and Yi ng China industrial concentrated district construction, a nd cit y main r oad construction, a nd Nort heast steam Trade Ce nter, and modern farmers i ndustry Park, and vocational educati on city, and lo w rental, and als o room constr ucti on, a nd features blocks buil d, a nd farmers market transformati on, and "rural versi on" Street transformation, focus engine ering s peed up implementation, effectivene ss obviousl y. Expe cted to be achieved t his year, are a-wi de G DP 17 billion

thrift of excellent traditi onal a nd style lack dee p of understa ndi ng, one -si ded t hink i n now of good s ituation Xi a, economic sm ooth more fast devel opme nt, and reform made major progres s, a nd people living significantly improve , and s ocia l t he care er made new pr ogress, no ne cessary always ha rd has, no a warene ss to Chi na als o ha s many poverty area, a nd al so has many poverty population of exists, m ore living impr ove ha s, more need ke ep hard of style . Thre e is not strictly honest. Total thought units i s a water se ctor, cle an s elf-dis cipline away from himself too far, no real pr oce ssing good living of impr ove and har d, and thrift excell ent traditional of relationshi p, no effective do comply with Constituti on a nd party of regulati ons must from I do up, no right mer cy good bitter Le, a nd wealt h of relati ons hip, no rig ht aware ness t o in comply with Constitution and par ty of regulations as pect s everyone ha s accountability. Four, f uture directi on a nd impr ovement meas ures 1, belief a nd faith, strengthe n party s pirit. One i s to firmly establi sh t he noble ideal s of struggl e for the i deals of communism, communist str uggle for life, ready t o sa crifice everyt hing for t he party a nd t he people. Se cond is t o conti nuously im prove the quality and standard of political, cons cienti ously study Deng Xi aopi ng the ory and "three re present s" important t hought a nd the scientific Outl ook on development, im plement t he party's basi c pr ogram for the pr imary stage of s ociali sm, adhere to t he corre ct politi cal orientation, m aintai n hig hly consistent w ith the CPC Ce ntral Committee, is good at t heorie s of socialism wit h Chine se characteri stics t o ana lyze and s olve pr oblem s. Third, strengt heni ng the party s pirit and the w orld tra nsformation, per severance of the party Constitution, relive Party vows t o establish corre ct worl d Outlook, Outlook on life and the worl d, pra ctically em bodies i deals and be liefs into action, combi ne l ofty ideals a nd practi cal activitie s, transformi ng the obj ective w orld, actively participate i n the great pra ctice of buil ding s ocialism with Chi nese chara cteristics. 2, kee p the purpose i n concept, cha nging the styl e of work. First, kee p in mi nd that the pur pose of servi ng, a dhere to a ssumi ng power for the people, kee p in mind the people and care a bout pe ople, a nd t he joys a nd sorrows of the masse s, ... According to city dis cipli ne, and municipal organi zation Departme nt requireme nts, today we hel d "implement impl ementation independent Commissi on against corr upti on gui deli nes effective strengt heni ng led cadres style construction" topi c democratic life, main task i s cl ose conta ct thought, and work a ctual , control che ck distri ct S tandi ng Committee team and the personal in im plementation independent Commissi on agai nst corr upti on guideli nes Shang exists of probl em, in-de pth carrie d out critici sm and self-criti cal, further clear re ctification dire ction and mea sures , effective enhanced cl ean politi cs of cons cious ness a nd i nitiative, firm set good of ruli ng image. Before t he meeting, t he way we take survey s soli cited a vie ws, combe d, related to team buil ding

解析

→ → → 由 4aBC+2bC A +3cAB=0,得

→ → → → → → 4aBC+3cAB=-2bC A =-2b(BA-BC)=2bAB+ → 2bBC,所以 4a=3c=2b. b2 4 2 2 a +c -b 4 +9b -b 11 由余弦定理得 cos B= =-24. 2ac = b2 2· 2· 3b
2 2 2

答案

A

二、填空题 → → → → 6.在△ABC 中,角 A,B,C 所对的边分别为 a,b,c,若AB· AC=BA· BC=1, 那么 c=________. 解析 → → → → 由题意知AB· AC+BA· BC=2,

→ → → → → → → 即AB· AC-AB· BC=AB· (AC+CB) → → =AB2=2?c=|AB|= 2. 答案 2

→ → → → → BA· BC 7.(2014· 南通一调)在△ABC 中,若 AB=1,AC= 3,|AB+AC|=|BC|,则 → |BC| =________. 解析 → → → 易知满足|AB+AC|=|BC|的 A,B,C 构成直角三角形的三个顶点,且∠

→ → BA· BC → 1 A 为直角,于是 =|BA|· cos∠ABC=1×cos 60° =2. → |BC| 答案 1 2

8.(2013· 东北三校一模)设△ABC 的内角 A,B,C 所对的边分别为 a,b,c,若

proje ct work, cadres , cadre s sele ction and ot her as pects of a total of 19, furt her defined t he dire ction of rectificati on, enhancing the perti nence an d effectivene ss of democrati c life. 能 鉴 生 高 提 步 一 歌 诗 代 2古 修 必 是 图 意 置 设 元 单 本 。 受 美 审 富 丰 得 获 力 魅 术 艺 悟 析 赏 行 进 品 作 对 面 方 等 巧 技 现 表 、 容 内 从 习 学 , 上 础 基 的 知 感 体 整 在

Good for thi s meeting, we requested t he Standing Committee of the munici pal party Committee, munici pal Secretary General Ta ng Wenjin, t he City Commissi on for disci pli ne inspe ction Standi ng Committee Ya ng Xu, Jiang Jixue, D eputy Direct or of the personnel office, a nd other lea ding comrade s prese nt gui dance all ows us to warm a ppla use for their welcome a nd tha nks!

Below, I first District Committee member of the 20XX team annua l democratic meeti ng implementati on of the c orrective meas ures, a s well as mem ber of the team a nd of my own report gui delines for the im plementation of the indepe nde nt C ommission against corr upti on stateme nt invited lea ders a nd comrade s criticis m. First, annual party on t he 20 XX team, M ember of democratic life acti on pl an impl ementation year 20 XX, distri ct

democrati c meeting a mem ber of the team on "study and practi ce t he s cientific Outl ook on devel opment" theme, find a pr oject supporting strong e nough, t he industry well e nough, urba n constructi on ma nagement leve l nee ds t o be im proved, liveli hood impr ovement needs to be strengt hened, district team itse lf, such as t he five as pects . Year of 20 XX, w e find out t he probl ems menti one d above, based on act ual Shunqing construction and devel opme nt, conscie ntiously s um up improveme nts, a chievi ng sig nificant devel opment re sults and effectivenes s of their work. (A) highlight the pro ject handle, mai ntain high gr owth of investment. A dhere to t he strategy as a Foundati on, carrying out proje cts to promote increased stamina im portant. One is t o increase t he inte nsity of proje cts towards. Actively s eek nati onal and provi nci al policy support , superi or special tra nsfer pay ments, a variety of a dditi onal i ncome will t op 7 00 million Yuan, a num ber of key infrastructur e proj ects, l ivelihood proje cts, i ndustrial proje cts int o the cage. Second, i ncreasi ng the pr oject attra cts. T his year a total of 23 sig ned a major proj ect, of whi ch 14 billion proje ct, China Metall urgical group, vanke gr oup, G uang dong he ngda gr oup, Taiwan Ruentex group, on the RI group, S henzhe n Kaisa, jife ng agricult ural machi ner y, Mer cede s-Be nz, A udi 4S store and ot her large e nterpri ses a nd proj ects have s ettled i n Shunqing. Third, strengt hen proj ect construction . Annua l impleme ntation focus pr oje ct 39 a , fixed as sets inve stment total w ill bre akthrough 12 billion yua n, created district y ilai history high, S outh door dam, and five i n shop ol d city tra nsformation, and Yi ng China industrial concentrated district construction, a nd city main r oad construction, a nd Nort heast steam Trade Ce nter, and modern farmers i ndustry Park, and vocational educati on city, and low rental, and als o room constr ucti on, a nd features blocks buil d, a nd farmers market transformati on, and "rural versi on" Street transformation, focus engine ering s peed up implementation, effectivene ss obviousl y. Expe cted to be achieved t his year, are a-wi de G DP 17 billion

thrift of excellent traditi onal a nd style lack dee p of understa ndi ng, one -si ded t hink i n now of good s ituation Xi a, economic sm ooth more fast devel opme nt, and reform made major progres s, a nd people living significantly improve , and s ocial t he care er made new pr ogr ess, no ne cessary always ha rd has, no a warene ss to Chi na als o ha s many poverty area, a nd al so has many poverty population of exists, m ore living impr ove ha s, more need ke ep hard of style . Thre e is not strictly honest. Total thought units i s a water se ctor, cle an s elf-dis cipline away from himself too far, no real pr oce ssing good living of impr ove and har d, and thrift excell ent tradi tional of relationshi p, no effective do comply with Constituti on a nd party of regulati ons must from I do up, no right mer cy g ood bitter Le, a nd wealt h of relati ons hip, no rig ht aware ness t o in comply with Constitution and party of regulations as pect s everyone ha s accountability. Four, f uture directi on a nd impr ovement meas ures 1, belief a nd faith, strengthe n party s pirit. One i s to firmly establi sh t he noble ideal s of struggl e for the i deals of communism, communist str uggle for life, ready t o sa crifice everyt hing for t he party a nd t he people. Se cond is t o conti nuously im prove the quality and standard of political, cons cienti ously study Deng Xi aopi ng the ory and "three re present s" important t hought a nd the scientific Outl ook on development, im plement t he party's basi c pr ogram for the pr imary stage of s ociali sm, adhere to t he corre ct politi cal orientation, maintai n hig hly consistent w ith the CPC Ce ntral Committee, is good at t heorie s of socialism wit h Chine se characteri stics t o ana lyze and s olve pr oblem s. Third, strengt heni ng the party s pirit and the w orld tra nsformation, per severance of the party Constitution, relive Party vows t o establish corre ct worl d Outlook, Outlook on life and the worl d, pra ctically em bodies i deals and be liefs into action, combi ne l ofty ideals a nd practi cal activitie s, transformi ng the obj ective w orld, actively participate i n the great pra ctice of buil ding s ocialism with Chi nese chara cteristics. 2, kee p the purpose i n concept, cha nging the styl e of work. First, kee p in mi nd that the pur po se of servi ng, a dhere to a ssumi ng power for the people, kee p in mind the people and care a bout pe ople, a nd t he joys a nd sorrows of the masse s, ... According to city dis cipli ne, and municipal organi zation Departme nt requireme nts, today we hel d "implement impl ementation independent Commissi on against corr upti on gui deli nes effective strengt heni ng led cadres style construction" topi c democratic life, main task i s cl ose conta ct thought, and work a ctual , control che ck distri ct Standi ng Committee team and the personal in im plementation independent Commissi on agai nst corr upti on guideli nes Shang exists of probl em, in-de pth carrie d out critici sm and self-criti cal, further clear re ctification dire ction and mea sures , effective enhanced cl ean politi cs of cons cious ness a nd i nitiative, firm set good of ruli ng image. Before t he meeting, t he way we take survey s soli cited a vie ws, combe d, related to team buil ding

→ → (3b-c)cos A=acos C,S△ABC= 2,则BA· AC=________. 解析 依题意得(3sin B-sin C)cos A=sin Acos C,

即 3sin Bcos A=sin Acos C+sin Ccos A=sin(A+C)=sin B>0, 1 于是有 cos A=3,sin A= 2 2 1-cos2A= 3 ,

1 1 2 2 又 S△ABC=2· bcsin A=2bc× 3 = 2, → → 1 所以 bc=3,BA· AC=bccos(π-A)=-bccos A=-3×3=-1. 答案 -1

三、解答题 9.已知圆 C:(x-3)2+(y-3)2=4 及点 A(1,1),M 是圆 C 上的任意一点,点 N → → 在线段 MA 的延长线上,且MA=2AN,求点 N 的轨迹方程. 解 → → 设 M(x0,y0),N(x,y).由MA=2AN,得

?x0=3-2x, (1-x0,1-y0)=2(x-1,y-1),∴? ?y0=3-2y. ∵点 M(x0,y0)在圆 C 上, ∴(x0-3)2+(y0-3)2=4, 即(3-2x-3)2+(3-2y-3)2=4.∴x2+y2=1. ∴所求点 N 的轨迹方程是 x2+y2=1. → → 10. (2014· 北京海淀模拟)在△ABC 中, 角 A, B, C 的对边分别为 a, b, c, 若AB· AC → → =BA· BC=k(k∈R). (1)判断△ABC 的形状; (2)若 c= 2,求 k 的值. 解 → → → → (1)∵AB· AC=cbcos A,BA· BC=cacos B,

→ → → → 又AB· AC=BA· BC,∴bccos A=accos B,
proje ct work, cadres , cadre s sele ction and ot her as pects of a total of 19, furt her defined t he dire ction of rectificati on, enhancing the perti nence and effectivene ss of democrati c life. 能 鉴 生 高 提 步 一 歌 诗 代 2古 修 必 是 图 意 置 设 元 单 本 。 受 美 审 富 丰 得 获 力 魅 术 艺 悟 析 赏 行 进 品 作 对 面 方 等 巧 技 现 表 、 容 内 从 习 学 , 上 础 基 的 知 感 体 整 在 Good for thi s meeting, we requested t he Standing Committee of the munici pal party Committee, munici pal Secretary General Ta ng Wenjin, t he City Commissi on for disci pli ne inspe ction Standi ng Committee Ya ng Xu, Jiang Jixue, D eputy Direct or of the personnel office, a nd other lea ding comrade s prese nt gui dance all ows us to warm a ppla use for their welcome a nd tha nks! Below, I first District Committee member of the 20XX team annua l democratic meeti ng implementati on of the corrective meas ures, a s well as mem ber of the team a nd of my own report gui delines for the im plementation of the indepe nde nt Commission against corr upti on stateme nt invited lea ders a nd comrade s criticis m. First, annual party on t he 20 XX team, M ember of democratic life acti on pl an impl ementation year 20 XX, distri ct

democrati c meeting a mem ber of the team on "study and practi ce t he s cientific Outl ook on devel opment" theme, find a pr oject supporting strong e nough, t he industry well e nough, urba n constructi on ma nagement leve l nee ds t o be im proved, liveli hood impr ovement needs to be strengt hened, district t eam itse lf, such as t he five as pects . Year of 20 XX, w e find out t he probl ems menti one d above, based on act ual Shunqing construction and devel opme nt, conscie ntiously s um up improveme nts, a chievi ng sig nificant devel opment re sults and effectivenes s of their work. (A) highlight the project handle, mai ntain high gr owth of investment. A dhere to t he strategy as a Foundati on, carrying out proje cts to promote increased stamina im portant. One is t o increase t he inte nsity of proje cts towards. Actively s eek nati onal and provi nci al policy support, superi or special tra nsfer pay ments, a variety of a dditi onal i ncome will t op 7 00 million Yuan, a num ber of key infrastructure proj ects, l ivelihood proje cts, i ndustrial proje cts int o the cage. Second, i ncreasi ng the pr oject attra cts. T his year a total of 23 sig ned a major proj ect, of whi ch 14 billion proje ct, China Metall urgical group, vanke gr oup, G uang dong he ngda gr oup, Taiwan Ruentex group, on the RI group, S henzhe n Kaisa, jife ng agricult ural machi ner y, Mer cede s-Be nz, A udi 4S store and ot her large e nterpri ses a nd proj ects have s ettled i n Shunqing. Third, strengt hen proj ect construction. Annua l impleme ntation focus pr oje ct 39 a , fixed as sets inve stment total w ill bre akthrough 12 billion yua n, created district y ilai history hi gh, S outh door dam, and five in shop ol d city tra nsformation, and Yi ng China industrial concentrated district construction, a nd cit y main r oad construction, a nd Nort heast steam Trade Ce nter, and modern farmers i ndustry Park, and vocational educati on city, and lo w rental, and als o room constr ucti on, a nd features blocks buil d, a nd farmers market transformati on, and "rural versi on" Street transformation, focus engine ering s peed up implementation, effectivene ss obviousl y. Expe cted to be achieved t his year, are a-wi de G DP 17 billion

thrift of excellent traditi onal a nd style lack dee p of understa ndi ng, one -si ded t hink i n now of good s ituation Xi a, economic sm ooth more fast devel opme nt, and reform made major progres s, a nd people living significantly improve , and s ocia l t he care er made new pr ogress, no ne cessary always ha rd has, no a warene ss to Chi na als o ha s many poverty area, a nd al so has many poverty population of exists, m ore living impr ove ha s, more need ke ep hard of style . Thre e is not strictly honest. Total thought units i s a water se ctor, cle an s elf-dis cipline away from himself too far, no real pr oce ssing good living of impr ove and har d, and thrift excell ent traditional of relationshi p, no effective do comply with Constituti on a nd party of regulati ons must from I do up, no right mer cy good bitter Le, a nd wealt h of relati ons hip, no rig ht aware ness t o in comply with Constitution and par ty of regulations as pect s everyone ha s accountability. Four, f uture directi on a nd impr ovement meas ures 1, belief a nd faith, strengthe n party s pirit. One i s to firmly establi sh t he noble ideal s of struggl e for the i deals of communism, communist str uggle for life, ready t o sa crifice everyt hing for t he party a nd t he people. Se cond is t o conti nuously im prove the quality and standard of political, cons cienti ously study Deng Xi aopi ng the ory and "three re present s" important t hought a nd the scientific Outl ook on development, im plement t he party's basi c pr ogram for the pr imary stage of s ociali sm, adhere to t he corre ct politi cal orientation, m aintai n hig hly consistent w ith the CPC Ce ntral Committee, is good at t heorie s of socialism wit h Chine se characteri stics t o ana lyze and s olve pr oblem s. Third, strengt heni ng the party s pirit and the w orld tra nsformation, per severance of the party Constitution, relive Party vows t o establish corre ct worl d Outlook, Outlook on life and the worl d, pra ctically em bodies i deals and be liefs into action, combi ne l ofty ideals a nd practi cal activitie s, transformi ng the obj ective w orld, actively participate i n the great pra ctice of buil ding s ocialism with Chi nese chara cteristics. 2, kee p the purpose i n concept, cha nging the styl e of work. First, kee p in mi nd that the pur pose of servi ng, a dhere to a ssumi ng power for the people, kee p in mind the people and care a bout pe ople, a nd t he joys a nd sorrows of the masse s, ... According to city dis cipli ne, and municipal organi zation Departme nt requireme nts, today we hel d "implement impl ementation independent Commissi on against corr upti on gui deli nes effective strengt heni ng led cadres style construction" topi c democratic life, main task i s cl ose conta ct thought, and work a ctual , control che ck distri ct S tandi ng Committee team and the personal in im plementation independent Commissi on agai nst corr upti on guideli nes Shang exists of probl em, in-de pth carrie d out critici sm and self-criti cal, further clear re ctification dire ction and mea sures , effective enhanced cl ean politi cs of cons cious ness a nd i nitiative, firm set good of ruli ng image. Before t he meeting, t he way we take survey s soli cited a vie ws, combe d, related to team buil ding

∴sin Bcos A=sin Acos B, 即 sin Acos B-sin Bcos A=0,∴sin(A-B)=0, ∵-π<A-B<π,∴A=B,即△ABC 为等腰三角形. → → b2+c2-a2 c2 (2)由(1)知,AB· AC=bccos A=bc· 2bc = 2 =k, ∵c= 2,∴k=1. 能力提升题组 (建议用时:25 分钟) 一、选择题 → → → → 1. 已知向量OB=(2,0), 向量OC=(2,2), 向量CA=( 2cos α, 2sin α), 则向量OA → 与向量OB的夹角的取值范围是 π? ? A.?0,4? ? ? π? ?5 C.?12π,2? ? ? ?π 5 ? B.?4,12π? ? ? ?π 5 ? D.?12,12π? ? ? ( ).

解析

→ → → 由题意,得OA=OC+CA=(2+ 2cos α,2+ 2sin α),所以点 A 的轨

→ 迹是圆(x-2)2+(y-2)2=2,如图,当 A 位于使直线 OA 与圆相切时,向量OA → 与向量OB的夹角分别达到最大、最小值,故选 D.

答案

D

→ 1→ → → 2.(2014· 北京东城区期末)已知△ABD 是等边三角形,且AB+2AD=AC,|CD| = 3,那么四边形 ABCD 的面积为(
proje ct work, cadres , cadre s sele ction and ot her as pects of a total of 19, furt her defined t he dire ction of rectificati on, enhancing the perti nence an d effectivene ss of democrati c life. 能 鉴 生 高 提 步 一 歌 诗 代 2古 修 必 是 图 意 置 设 元 单 本 。 受 美 审 富 丰 得 获 力 魅 术 艺 悟 析 赏 行 进 品 作 对 面 方 等 巧 技 现 表 、 容 内 从 习 学 , 上 础 基 的 知 感 体 整 在

).
Below, I first District Committee member of the 20XX team annua l democratic meeti ng implementati on of the c orrective meas ures, a s well as mem ber of the team a nd of my own report gui delines for the im plementation of the indepe nde nt C ommission against corr upti on stateme nt invited lea ders a nd comrade s criticis m. First, annual party on t he 20 XX team, M ember of democratic life acti on pl an impl ementation year 20 XX, distri ct

Good for thi s meeting, we requested t he Standing Committee of the munici pal party Committee, munici pal Secretary General Ta ng Wenjin, t he City Commissi on for disci pli ne inspe ction Standi ng Committee Ya ng Xu, Jiang Jixue, D eputy Direct or of the personnel office, a nd other lea ding comrade s prese nt gui dance all ows us to warm a ppla use for their welcome a nd tha nks!

democrati c meeting a mem ber of the team on "study and practi ce t he s cientific Outl ook on devel opment" theme, find a pr oject supporting strong e nough, t he industry well e nough, urba n constructi on ma nagement leve l nee ds t o be im proved, liveli hood impr ovement needs to be strengt hened, district team itse lf, such as t he five as pects . Year of 20 XX, w e find out t he probl ems menti one d above, based on act ual Shunqing construction and devel opme nt, conscie ntiously s um up improveme nts, a chievi ng sig nificant devel opment re sults and effectivenes s of their work. (A) highlight the pro ject handle, mai ntain high gr owth of investment. A dhere to t he strategy as a Foundati on, carrying out proje cts to promote increased stamina im portant. One is t o increase t he inte nsity of proje cts towards. Actively s eek nati onal and provi nci al policy support , superi or special tra nsfer pay ments, a variety of a dditi onal i ncome will t op 7 00 million Yuan, a num ber of key infrastructur e proj ects, l ivelihood proje cts, i ndustrial proje cts int o the cage. Second, i ncreasi ng the pr oject attra cts. T his year a total of 23 sig ned a major proj ect, of whi ch 14 billion proje ct, China Metall urgical group, vanke gr oup, G uang dong he ngda gr oup, Taiwan Ruentex group, on the RI group, S henzhe n Kaisa, jife ng agricult ural machi ner y, Mer cede s-Be nz, A udi 4S store and ot her large e nterpri ses a nd proj ects have s ettled i n Shunqing. Third, strengt hen proj ect construction . Annua l impleme ntation focus pr oje ct 39 a , fixed as sets inve stment total w ill bre akthrough 12 billion yua n, created district y ilai history high, S outh door dam, and five i n shop ol d city tra nsformation, and Yi ng China industrial concentrated district construction, a nd city main r oad construction, a nd Nort heast steam Trade Ce nter, and modern farmers i ndustry Park, and vocational educati on city, and low rental, and als o room constr ucti on, a nd features blocks buil d, a nd farmers market transformati on, and "rural versi on" Street transformation, focus engine ering s peed up implementation, effectivene ss obviousl y. Expe cted to be achieved t his year, are a-wi de G DP 17 billion

thrift of excellent traditi onal a nd style lack dee p of understa ndi ng, one -si ded t hink i n now of good s ituation Xi a, economic sm ooth more fast devel opme nt, and reform made major progres s, a nd people living significantly improve , and s ocial t he care er made new pr ogr ess, no ne cessary always ha rd has, no a warene ss to Chi na als o ha s many poverty area, a nd al so has many poverty population of exists, m ore living impr ove ha s, more need ke ep hard of style . Thre e is not strictly honest. Total thought units i s a water se ctor, cle an s elf-dis cipline away from himself too far, no real pr oce ssing good living of impr ove and har d, and thrift excell ent tradi tional of relationshi p, no effective do comply with Constituti on a nd party of regulati ons must from I do up, no right mer cy g ood bitter Le, a nd wealt h of relati ons hip, no rig ht aware ness t o in comply with Constitution and party of regulations as pect s everyone ha s accountability. Four, f uture directi on a nd impr ovement meas ures 1, belief a nd faith, strengthe n party s pirit. One i s to firmly establi sh t he noble ideal s of struggl e for the i deals of communism, communist str uggle for life, ready t o sa crifice everyt hing for t he party a nd t he people. Se cond is t o conti nuously im prove the quality and standard of political, cons cienti ously study Deng Xi aopi ng the ory and "three re present s" important t hought a nd the scientific Outl ook on development, im plement t he party's basi c pr ogram for the pr imary stage of s ociali sm, adhere to t he corre ct politi cal orientation, maintai n hig hly consistent w ith the CPC Ce ntral Committee, is good at t heorie s of socialism wit h Chine se characteri stics t o ana lyze and s olve pr oblem s. Third, strengt heni ng the party s pirit and the w orld tra nsformation, per severance of the party Constitution, relive Party vows t o establish corre ct worl d Outlook, Outlook on life and the worl d, pra ctically em bodies i deals and be liefs into action, combi ne l ofty ideals a nd practi cal activitie s, transformi ng the obj ective w orld, actively participate i n the great pra ctice of buil ding s ocialism with Chi nese chara cteristics. 2, kee p the purpose i n concept, cha nging the styl e of work. First, kee p in mi nd that the pur po se of servi ng, a dhere to a ssumi ng power for the people, kee p in mind the people and care a bout pe ople, a nd t he joys a nd sorrows of the masse s, ... According to city dis cipli ne, and municipal organi zation Departme nt requireme nts, today we hel d "implement impl ementation independent Commissi on against corr upti on gui deli nes effective strengt heni ng led cadres style construction" topi c democratic life, main task i s cl ose conta ct thought, and work a ctual , control che ck distri ct Standi ng Committee team and the personal in im plementation independent Commissi on agai nst corr upti on guideli nes Shang exists of probl em, in-de pth carrie d out critici sm and self-criti cal, further clear re ctification dire ction and mea sures , effective enhanced cl ean politi cs of cons cious ness a nd i nitiative, firm set good of ruli ng image. Before t he meeting, t he way we take survey s soli cited a vie ws, combe d, related to team buil ding

3 A. 2 C.3 3 解析

3 B.2 9 D.2

3 3

→ → → 1→ → → ?1 → → ? 如图所示,CD=AD-AC=2AD-AB,∴CD2=? AD-AB?2, ?2 ?

→ → → 1→ 即 3=4AD2+AB2-AD· AB, → → ∵|AD|=|AB|, → → → 5→ ∴4|AD|2-|AD||AB|cos 60° =3,∴|AD|=2. → → → 1→ → 1→ 又BC=AC-AB=2AD,∴|BC|=2|AD|=1, → → → ∴|BC|2+|CD|2=|BD|2,∴BC⊥CD. 1 1 3 ∴S 四边形 ABCD=S△ABD+S△BCD=2×22×sin 60° +2×1× 3=2 答案 B 3,故选 B.

二、填空题 3.(2014· 苏锡常镇二调)已知向量 a,b 满足|a|= 2,|b|=1,且对一切实数 x,|a +xb|≥|a+b|恒成立,则 a 与 b 的夹角大小为________. 解析 |a|= 2,|b|=1,|a+xb|≥|a+b|对一切实数 x 恒成立,两边平方整理

得 x2+2a· bx-2a· b-1≥0 对一切实数 x 恒成立, 所以(2a· b)2+4(2a· b+1)≤0, a· b 2 即(a· b+1)2≤0,所以 a· b=-1,故 cos<a,b>=|a||b|=- 2 ,又<a,b>∈[0,
proje ct work, cadres , cadre s sele ction and ot her as pects of a total of 19, furt her defined t he dire ction of rectificati on, enhancing the perti nence and effectivene ss of democrati c life. 能 鉴 生 高 提 步 一 歌 诗 代 2古 修 必 是 图 意 置 设 元 单 本 。 受 美 审 富 丰 得 获 力 魅 术 艺 悟 析 赏 行 进 品 作 对 面 方 等 巧 技 现 表 、 容 内 从 习 学 , 上 础 基 的 知 感 体 整 在 Good for thi s meeting, we requested t he Standing Committee of the munici pal party Committee, munici pal Secretary General Ta ng Wenjin, t he City Commissi on for disci pli ne inspe ction Standi ng Committee Ya ng Xu, Jiang Jixue, D eputy Direct or of the personnel office, a nd other lea ding comrade s prese nt gui dance all ows us to warm a ppla use for their welcome a nd tha nks! Below, I first District Committee member of the 20XX team annua l democratic meeti ng implementati on of the corrective meas ures, a s well as mem ber of the team a nd of my own report gui delines for the im plementation of the indepe nde nt Commission against corr upti on stateme nt invited lea ders a nd comrade s criticis m. First, annual party on t he 20 XX team, M ember of democratic life acti on pl an impl ementation year 20 XX, distri ct democrati c meeting a mem ber of the team on "study and practi ce t he s cientific Outl ook on devel opment" theme, find a pr oject supporting strong e nough, t he industry well e nough, urba n constructi on ma nagement leve l nee ds t o be im proved, liveli hood impr ovement needs to be strengt hened, district t eam itse lf, such as t he five as pects . Year of 20 XX, w e find out t he probl ems menti one d above, based on act ual Shunqing construction and devel opme nt, conscie ntiously s um up improveme nts, a chievi ng sig nificant devel opment re sults and effectivenes s of their work. (A) highlight the project handle, mai ntain high gr owth of investment. A dhere to t he strategy as a Foundati on, carrying out proje cts to promote increased stamina im portant. One is t o increase t he inte nsity of proje cts towards. Actively s eek nati onal and provi nci al policy support, superi or special tra nsfer pay ments, a variety of a dditi onal i ncome will t op 7 00 million Yuan, a num ber of key infrastructure proj ects, l ivelihood proje cts, i ndustrial proje cts int o the cage. Second, i ncreasi ng the pr oject attra cts. T his year a total of 23 sig ned a major proj ect, of whi ch 14 billion proje ct, China Metall urgical group, vanke gr oup, G uang dong he ngda gr oup, Taiwan Ruentex group, on the RI group, S henzhe n Kaisa, jife ng agricult ural machi ner y, Mer cede s-Be nz, A udi 4S store and ot her large e nterpri ses a nd proj ects have s ettled i n Shunqing. Third, strengt hen proj ect construction. Annua l impleme ntation focus pr oje ct 39 a , fixed as sets inve stment total w ill bre akthrough 12 billion yua n, created district y ilai history hi gh, S outh door dam, and five in shop ol d city tra nsformation, and Yi ng China industrial concentrated district construction, a nd cit y main r oad construction, a nd Nort heast steam Trade Ce nter, and modern farmers i ndustry Park, and vocational educati on city, and lo w rental, and als o room constr ucti on, a nd features blocks buil d, a nd farmers market transformati on, and "rural versi on" Street transformation, focus engine ering s peed up implementation, effectivene ss obviousl y. Expe cted to be achieved t his year, are a-wi de G DP 17 billion

thrift of excellent traditi onal a nd style lack dee p of understa ndi ng, one -si ded t hink i n now of good s ituation Xi a, economic sm ooth more fast devel opme nt, and reform made major progres s, a nd people living significantly improve , and s ocia l t he care er made new pr ogress, no ne cessary always ha rd has, no a warene ss to Chi na als o ha s many poverty area, a nd al so has many poverty population of exists, m ore living impr ove ha s, more need ke ep hard of style . Thre e is not strictly honest. Total thought units i s a water se ctor, cle an s elf-dis cipline away from himself too far, no real pr oce ssing good living of impr ove and har d, and thrift excell ent traditional of relationshi p, no effective do comply with Constituti on a nd party of regulati ons must from I do up, no right mer cy good bitter Le, a nd wealt h of relati ons hip, no rig ht aware ness t o in comply with Constitution and par ty of regulations as pect s everyone ha s accountability. Four, f uture directi on a nd impr ovement meas ures 1, belief a nd faith, strengthe n party s pirit. One i s to firmly establi sh t he noble ideal s of struggl e for the i deals of communism, communist str uggle for life, ready t o sa crifice everyt hing for t he party a nd t he people. Se cond is t o conti nuously im prove the quality and standard of political, cons cienti ously study Deng Xi aopi ng the ory and "three re present s" important t hought a nd the scientific Outl ook on development, im plement t he party's basi c pr ogram for the pr imary stage of s ociali sm, adhere to t he corre ct politi cal orientation, m aintai n hig hly consistent w ith the CPC Ce ntral Committee, is good at t heorie s of socialism wit h Chine se characteri stics t o ana lyze and s olve pr oblem s. Third, strengt heni ng the party s pirit and the w orld tra nsformation, per severance of the party Constitution, relive Party vows t o establish corre ct worl d Outlook, Outlook on life and the worl d, pra ctically em bodies i deals and be liefs into action, combi ne l ofty ideals a nd practi cal activitie s, transformi ng the obj ective w orld, actively participate i n the great pra ctice of buil ding s ocialism with Chi nese chara cteristics. 2, kee p the purpose i n concept, cha nging the styl e of work. First, kee p in mi nd that the pur pose of servi ng, a dhere to a ssumi ng power for the people, kee p in mind the people and care a bout pe ople, a nd t he joys a nd sorrows of the masse s, ... According to city dis cipli ne, and municipal organi zation Departme nt requireme nts, today we hel d "implement impl ementation independent Commissi on against corr upti on gui deli nes effective strengt heni ng led cadres style construction" topi c democratic life, main task i s cl ose conta ct thought, and work a ctual , control che ck distri ct S tandi ng Committee team and the personal in im plementation independent Commissi on agai nst corr upti on guideli nes Shang exists of probl em, in-de pth carrie d out critici sm and self-criti cal, further clear re ctification dire ction and mea sures , effective enhanced cl ean politi cs of cons cious ness a nd i nitiative, firm set good of ruli ng image. Before t he meeting, t he way we take survey s soli cited a vie ws, combe d, related to team buil ding

3π 3π π],所以<a,b>= 4 ,即 a,b 的夹角是 4 . 答案 3π 4

三、解答题 x ? ? 4.(2014· 南通模拟)已知向量 m=? 3sin 4,1?, ? ? x x? ? n=?cos 4,cos24?. ? ? ?2π ? (1)若 m· n=1,求 cos? 3 -x?的值; ? ? (2)记 f(x)=m· n,在△ABC 中,角 A,B,C 的对边分别是 a,b,c,且满足(2a -c)cos B=bcos C,求函数 f(A)的取值范围. 解 x x x (1)m· n= 3sin 4· cos 4+cos24

x 1+cos 2 3 x ? x π? 1 ?2+6?+ , = 2 sin 2+ = sin 2 ? ? 2 ? x π? 1 ∵m· n=1,∴sin?2+6?=2. ? ? ? π? ? x π? 1 cos?x+3?=1-2sin2?2+6?=2, ? ? ? ? 1 ?2π ? ? π? cos? 3 -x?=-cos?x+3?=-2. ? ? ? ? (2)∵(2a-c)cos B=bcos C, 由正弦定理得(2sin A-sin C)cos B=sin Bcos C, ∴2sin Acos B-sin Ccos B=sin Bcos C. ∴2sin Acos B=sin(B+C). ∵A+B+C=π,∴sin(B+C)=sin A≠0. 1 ∴cos B=2, π 2π ∵0<B<π,∴B=3,∴0<A< 3 . π A π π ?A π? ?1 ? ∴6< 2 +6<2,sin? 2 +6?∈?2,1?. ? ? ? ?

proje ct work, cadres , cadre s sele ction and ot her as pects of a total of 19, furt her defined t he dire ction of rectificati on, enhancing the perti nence an d effectivene ss of democrati c life. 能 鉴 生 高 提 步 一 歌 诗 代 2古 修 必 是 图 意 置 设 元 单 本 。 受 美 审 富 丰 得 获 力 魅 术 艺 悟 析 赏 行 进 品 作 对 面 方 等 巧 技 现 表 、 容 内 从 习 学 , 上 础 基 的 知 感 体 整 在

Good for thi s meeting, we requested t he Standing Committee of the munici pal party Committee, munici pal Secretary General Ta ng Wenjin, t he City Commissi on for disci pli ne inspe ction Standi ng Committee Ya ng Xu, Jiang Jixue, D eputy Direct or of the personnel office, a nd other lea ding comrade s prese nt gui dance all ows us to warm a ppla use for their welcome a nd tha nks!

Below, I first District Committee member of the 20XX team annua l democratic meeti ng implementati on of the c orrective meas ures, a s well as mem ber of the team a nd of my own report gui delines for the im plementation of the indepe nde nt C ommission against corr upti on stateme nt invited lea ders a nd comrade s criticis m. First, annual party on t he 20 XX team, M ember of democratic life acti on pl an impl ementation year 20 XX, distri ct

democrati c meeting a mem ber of the team on "study and practi ce t he s cientific Outl ook on devel opment" theme, find a pr oject supporting strong e nough, t he industry well e nough, urba n constructi on ma nagement leve l nee ds t o be im proved, liveli hood impr ovement needs to be strengt hened, district team itse lf, such as t he five as pects . Year of 20 XX, w e find out t he probl ems menti one d above, based on act ual Shunqing construction and devel opme nt, conscie ntiously s um up improveme nts, a chievi ng sig nificant devel opment re sults and effectivenes s of their work. (A) highlight the pro ject handle, mai ntain high gr owth of investment. A dhere to t he strategy as a Foundati on, carrying out proje cts to promote increased stamina im portant. One is t o increase t he inte nsity of proje cts towards. Actively s eek nati onal and provi nci al policy support , superi or special tra nsfer pay ments, a variety of a dditi onal i ncome will t op 7 00 million Yuan, a num ber of key infrastructur e proj ects, l ivelihood proje cts, i ndustrial proje cts int o the cage. Second, i ncreasi ng the pr oject attra cts. T his year a total of 23 sig ned a major proj ect, of whi ch 14 billion proje ct, China Metall urgical group, vanke gr oup, G uang dong he ngda gr oup, Taiwan Ruentex group, on the RI group, S henzhe n Kaisa, jife ng agricult ural machi ner y, Mer cede s-Be nz, A udi 4S store and ot her large e nterpri ses a nd proj ects have s ettled i n Shunqing. Third, strengt hen proj ect construction . Annua l impleme ntation focus pr oje ct 39 a , fixed as sets inve stment total w ill bre akthrough 12 billion yua n, created district y ilai history high, S outh door dam, and five i n shop ol d city tra nsformation, and Yi ng China industrial concentrated district construction, a nd city main r oad construction, a nd Nort heast steam Trade Ce nter, and modern farmers i ndustry Park, and vocational educati on city, and low rental, and als o room constr ucti on, a nd features blocks buil d, a nd farmers market transformati on, and "rural versi on" Street transformation, focus engine ering s peed up implementation, effectivene ss obviousl y. Expe cted to be achieved t his year, are a-wi de G DP 17 billion

thrift of excellent traditi onal a nd style lack dee p of understa ndi ng, one -si ded t hink i n now of good s ituation Xi a, economic sm ooth more fast devel opme nt, and reform made major progres s, a nd people living significantly improve , and s ocial t he care er made new pr ogr ess, no ne cessary always ha rd has, no a warene ss to Chi na als o ha s many poverty area, a nd al so has many poverty population of exists, m ore living impr ove ha s, more need ke ep hard of style . Thre e is not strictly honest. Total thought units i s a water se ctor, cle an s elf-dis cipline away from himself too far, no real pr oce ssing good living of impr ove and har d, and thrift excell ent tradi tional of relationshi p, no effective do comply with Constituti on a nd party of regulati ons must from I do up, no right mer cy g ood bitter Le, a nd wealt h of relati ons hip, no rig ht aware ness t o in comply with Constitution and party of regulations as pect s everyone ha s accountability. Four, f uture directi on a nd impr ovement meas ures 1, belief a nd faith, strengthe n party s pirit. One i s to firmly establi sh t he noble ideal s of struggl e for the i deals of communism, communist str uggle for life, ready t o sa crifice everyt hing for t he party a nd t he people. Se cond is t o conti nuously im prove the quality and standard of political, cons cienti ously study Deng Xi aopi ng the ory and "three re present s" important t hought a nd the scientific Outl ook on development, im plement t he party's basi c pr ogram for the pr imary stage of s ociali sm, adhere to t he corre ct politi cal orientation, maintai n hig hly consistent w ith the CPC Ce ntral Committee, is good at t heorie s of socialism wit h Chine se characteri stics t o ana lyze and s olve pr oblem s. Third, strengt heni ng the party s pirit and the w orld tra nsformation, per severance of the party Constitution, relive Party vows t o establish corre ct worl d Outlook, Outlook on life and the worl d, pra ctically em bodies i deals and be liefs into action, combi ne l ofty ideals a nd practi cal activitie s, transformi ng the obj ective w orld, actively participate i n the great pra ctice of buil ding s ocialism with Chi nese chara cteristics. 2, kee p the purpose i n concept, cha nging the styl e of work. First, kee p in mi nd that the pur po se of servi ng, a dhere to a ssumi ng power for the people, kee p in mind the people and care a bout pe ople, a nd t he joys a nd sorrows of the masse s, ... According to city dis cipli ne, and municipal organi zation Departme nt requireme nts, today we hel d "implement impl ementation independent Commissi on against corr upti on gui deli nes effective strengt heni ng led cadres style construction" topi c democratic life, main task i s cl ose conta ct thought, and work a ctual , control che ck distri ct Standi ng Committee team and the personal in im plementation independent Commissi on agai nst corr upti on guideli nes Shang exists of probl em, in-de pth carrie d out critici sm and self-criti cal, further clear re ctification dire ction and mea sures , effective enhanced cl ean politi cs of cons cious ness a nd i nitiative, firm set good of ruli ng image. Before t he meeting, t he way we take survey s soli cited a vie ws, combe d, related to team buil ding

? x π? 1 又∵f(x)=sin?2+6?+2, ? ? ?A π? 1 ∴f(A)=sin? 2 +6?+2. ? ? 3? ? 故函数 f(A)的取值范围是?1,2?. ? ?

proje ct work, cadres , cadre s sele ction and ot her as pects of a total of 19, furt her defined t he dire ction of rectificati on, enhancing the perti nence and effectivene ss of democrati c life. 能 鉴 生 高 提 步 一 歌 诗 代 2古 修 必 是 图 意 置 设 元 单 本 。 受 美 审 富 丰 得 获 力 魅 术 艺 悟 析 赏 行 进 品 作 对 面 方 等 巧 技 现 表 、 容 内 从 习 学 , 上 础 基 的 知 感 体 整 在

Good for thi s meeting, we requested t he Standing Committee of the munici pal party Committee, munici pal Secretary General Ta ng Wenjin, t he City Commissi on for disci pli ne inspe ction Standi ng Committee Ya ng Xu, Jiang Jixue, D eputy Direct or of the personnel office, a nd other lea ding comrade s prese nt gui dance all ows us to warm a ppla use for their welcome a nd tha nks!

Below, I first District Committee member of the 20XX team annua l democratic meeti ng implementati on of the corrective meas ures, a s well as mem ber of the team a nd of my own report gui delines for the im plementation of the indepe nde nt Commission against corr upti on stateme nt invited lea ders a nd comrade s criticis m. First, annual party on t he 20 XX team, M ember of democratic life acti on pl an impl ementation year 20 XX, distri ct

democrati c meeting a mem ber of the team on "study and practi ce t he s cientific Outl ook on devel opment" theme, find a pr oject supporting strong e nough, t he industry well e nough, urba n constructi on ma nagement leve l nee ds t o be im proved, liveli hood impr ovement needs to be strengt hened, district t eam itse lf, such as t he five as pects . Year of 20 XX, w e find out t he probl ems menti one d above, based on act ual Shunqing construction and devel opme nt, conscie ntiously s um up improveme nts, a chievi ng sig nificant devel opment re sults and effectivenes s of their work. (A) highlight the project handle, mai ntain high gr owth of investment. A dhere to t he strategy as a Foundati on, carrying out proje cts to promote increased stamina im portant. One is t o increase t he inte nsity of proje cts towards. Actively s eek nati onal and provi nci al policy support, superi or special tra nsfer pay ments, a variety of a dditi onal i ncome will t op 7 00 million Yuan, a num ber of key infrastructure proj ects, l ivelihood proje cts, i ndustrial proje cts int o the cage. Second, i ncreasi ng the pr oject attra cts. T his year a total of 23 sig ned a major proj ect, of whi ch 14 billion proje ct, China Metall urgical group, vanke gr oup, G uang dong he ngda gr oup, Taiwan Ruentex group, on the RI group, S henzhe n Kaisa, jife ng agricult ural machi ner y, Mer cede s-Be nz, A udi 4S store and ot her large e nterpri ses a nd proj ects have s ettled i n Shunqing. Third, strengt hen proj ect construction. Annua l impleme ntation focus pr oje ct 39 a , fixed as sets inve stment total w ill bre akthrough 12 billion yua n, created district y ilai history hi gh, S outh door dam, and five in shop ol d city tra nsformation, and Yi ng China industrial concentrated district construction, a nd cit y main r oad construction, a nd Nort heast steam Trade Ce nter, and modern farmers i ndustry Park, and vocational educati on city, and lo w rental, and als o room constr ucti on, a nd features blocks buil d, a nd farmers market transformati on, and "rural versi on" Street transformation, focus engine ering s peed up implementation, effectivene ss obviousl y. Expe cted to be achieved t his year, are a-wi de G DP 17 billion