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三角函数详细数值表


初中三角函数详细数值表
首先,我们先理解基础概念,如下:

SinA= TanA=

?A的对边 斜边
?A的对边 ?A的邻边

CosA= CotA=

?A的邻边 斜边
?A的邻边 ?A的对边

还有一点很重要,

0 <

sinA < 1
根据三角函数的定义,我们还可以得出

SinA*2+CosA*2=1 TanA · CotA=1

TanA=SinA/CosA CotA=CosA/SinA TanA=1/CotA sin A= cos(90?- A) tan A =cotA(90?- A)

此为必背图表
角度 0度 三角函数 sin cos tan cot 0 1 0 ―― 1/2
3 2 3 3

30度

45度
2 2
2 2

60度
3 2

90度 1 0 ―― 0

1/2
3

1 1

3

3 3

相对应的示意图见下页~~~~~~~~~~~~~~~~~

<A=30度

<A=45度

<A=60度

接下来如标题示,整理好的三角函数表
sin15=(√6-√2)/4 ,

sin75=(√6+√2)/2 , sin105=√2/2*(√3/2+1/2) sin120=√3/2 sin135=√2/2 sin150=1/2 sin165=(√6-√2)/4 sin180=0 sin270=-1 sin360=0

(上为特殊值)

sin1=0.01745 sin2=0.034899 sin3=0.052335 sin4=0.069756 sin5=0.087155 sin6=0.104528 sin7=0.121869 sin8=0.139173 sin9=0.156434 sin10=0.17364 sin11=0.19080 sin12=0.20791 sin13=0.22495 sin14=0.24192 sin15=0.25881 sin16=0.27563 sin17=0.29237

sin18=0.30901 sin19=0.32556 sin20=0.34202

sin21=0.35836 sin22=0.37460 sin23=0.39073 sin24=0.40673 sin25=0.42261 sin26=0.43837 sin27=0.45399 sin28=0.46947 sin29=0.48480 sin30=0.49999 sin31=0.51503 sin32=0.52991 sin33=0.54463 sin34=0.55919 sin35=0.57357 sin36=0.58778 sin37=0.60181 sin38=0.61566 sin39=0.62932 sin40=0.64278 sin41=0.65605 sin42=0.66913 sin43=0.68199 sin44=0.69465 sin45=0.70710 sin46=0.71933

sin47=0.73135 sin48=0.74314 sin49=0.75470 sin50=0.76604 sin51=0.77714 sin52=0.78801 sin53=0.79863 sin54=0.80901 sin55=0.81915 sin56=0.82903 sin57=0.83867 sin58=0.84804 sin59=0.85716 sin60=0.86602 sin61=0.87461 sin62=0.88294 sin63=0.89100 sin64=0.89879 sin65=0.90630 sin66=0.91354 sin67=0.92050 sin68=0.92718 sin69=0.93358 sin70=0.93969 sin71=0.94551 sin72=0.95105 sin73=0.95630 sin74=0.96126 sin75=0.96592 sin76=0.97029

sin77=0.97437 sin78=0.97814 sin79=0.98162 sin80=0.98480 sin81=0.98768 sin82=0.99026 sin83=0.99254 sin84=0.99452 sin85=0.99619 sin86=0.99756 sin87=0.99862 sin88=0.99939 sin89=0.99984 sin90=1 cos1=0.99984 cos2=0.99939 cos3=0.99862 cos4=0.99756 cos5=0.99619 cos6=0.99452 cos7=0.99254 cos8=0.99026 cos9=0.98768 cos10=0.9848 cos11=0.9816 cos12=0.97814 cos13=0.9743 cos14=0.9702 cos15=0.9659 cos16=0.9612

cos17=0.9563 cos18=0.9510 cos19=0.9455 cos20=0.9396 cos21=0.9335 cos22=0.9271 cos23=0.9205 cos24=0.9135 cos25=0.9063 cos26=0.8987 cos27=0.8910 cos28=0.8829 cos29=0.8746 cos30=0.8660 cos31=0.8571 cos32=0.8480 cos33=0.8386 cos34=0.8290 cos35=0.8191 cos36=0.8090 cos37=0.7986 cos38=0.7880 cos39=0.7771 cos40=0.7660 cos41=0.7547 cos42=0.7431 cos43=0.7313 cos44=0.7193 cos45=0.7071 cos46=0.6946

cos47=0.6819 cos48=0.6691 cos49=0.6560 cos50=0.6427 cos51=0.6293 cos52=0.6156 cos53=0.6018 cos54=0.5877 cos55=0.5735 cos56=0.5592 cos57=0.5446 cos58=0.5299 cos59=0.5150 cos60=0.5000 cos61=0.4848 cos62=0.4694 cos63=0.4539 cos64=0.4383 cos65=0.4226 cos66=0.4067 cos67=0.3907 cos68=0.3746 cos69=0.3583 cos70=0.3420 cos71=0.3255 cos72=0.3090 cos73=0.2923 cos74=0.2756 cos75=0.2588 cos76=0.2419

cos77=0.2249 cos78=0.2079 cos79=0.1908 cos80=0.1736 cos81=0.1564 cos82=0.1391 cos83=0.1218 cos84=0.1045 cos85=0.0871 cos86=0.06973 cos87=0.052 cos88=0.0348 cos89=0.0174 cos90=0 tan1=0.017455 tan2=0.034920 tan3=0.052407 tan4=0.069926 tan5=0.087488 tan6=0.105104 tan7=0.122784 tan8=0.140540 tan9=0.158384 tan10=0.17632 tan11=0.19438 tan12=0.21255 tan13=0.23086 tan14=0.24932 tan15=0.26794 tan16=0.28674

tan17=0.30573 tan18=0.32491 tan19=0.34432 tan20=0.36397 tan21=0.38386 tan22=0.40402 tan23=0.42447 tan24=0.44522 tan25=0.46630 tan26=0.48773 an27=0.50952 tan28=0.53170 tan29=0.55430 tan30=0.57735 tan31=0.60086 tan32=0.62486 tan33=0.64940 tan34=0.67450 tan35=0.70020 tan36=0.72654 tan37=0.75355 tan38=0.78128 tan39=0.80978 tan40=0.83909 tan41=0.86928 tan42=0.90040 tan43=0.93251 tan44=0.96568 tan45=0.99999 tan46=1.03553

tan47=1.07236 tan48=1.11061 tan49=1.15036 tan50=1.19175 tan51=1.23489 tan52=1.27994 tan53=1.32704 tan54=1.3763 tan55=1.42814 tan56=1.48256 tan57=1.53986 tan58=1.60033 tan59=1.66427 tan60=1.73205 tan61=1.80404 tan62=1.88072 tan63=1.96261 tan64=2.05030 tan65=2.14450 tan66=2.24603 tan67=2.35585 tan68=2.47508 tan69=2.60508 tan70=2.74747 tan71=2.90421 tan72=3.07768 tan73=3.27085 tan74=3.48741 tan75=3.73205 tan76=4.01078

tan77=4.33147 tan78=4.70463 tan79=5.14455 tan80=5.67128 tan81=6.31375 tan82=7.11536 tan83=8.14434 tan84=9.51436 tan85=11.4300 tan86=14.3006 tan87=19.0811 tan88=28.6362 tan89=57.2899 tan90=无取值

如果求精确度的话,还可以看下面
sin1=0.01745240643728351 sin2=0.03489949670250097 sin3=0.05233595624294383 sin4=0.0697564737441253 sin5=0.08715574274765816 sin6=0.10452846326765346 sin7=0.12186934340514747 sin8=0.13917310096006544 sin9=0.15643446504023087 sin10=0.17364817766693033 sin11=0.1908089953765448 sin12=0.20791169081775931 sin13=0.22495105434386497 sin14=0.24192189559966773

sin15=0.25881904510252074 sin16=0.27563735581699916 sin17=0.2923717047227367 sin18=0.3090169943749474 sin19=0.3255681544571567 sin20=0.3420201433256687 sin21=0.35836794954530027 sin22=0.374606593415912 sin23=0.3907311284892737 sin24=0.40673664307580015 sin25=0.42261826174069944 sin26=0.4383711467890774 sin27=0.45399049973954675 sin28=0.4694715627858908 sin29=0.48480962024633706 sin30=0.49999999999999994 sin31=0.5150380749100542 sin32=0.5299192642332049 sin33=0.544639035015027 sin34=0.5591929034707468 sin35=0.573576436351046 sin36=0.5877852522924731 sin37=0.6018150231520483 sin38=0.6156614753256583 sin39=0.6293203910498375 sin40=0.6427876096865392 sin41=0.6560590289905073 sin42=0.6691306063588582 sin43=0.6819983600624985 sin44=0.6946583704589972

sin45=0.7071067811865475 sin46=0.7193398003386511 sin47=0.7313537016191705 sin48=0.7431448254773941 sin49=0.7547095802227719 sin50=0.766044443118978 sin51=0.7771459614569708 sin52=0.7880107536067219 sin53=0.7986355100472928 sin54=0.8090169943749474 sin55=0.8191520442889918 sin56=0.8290375725550417 sin57=0.8386705679454239 sin58=0.848048096156426 sin59=0.8571673007021122 sin60=0.8660254037844386 sin61=0.8746197071393957 sin62=0.8829475928589269 sin63=0.8910065241883678 sin64=0.898794046299167 sin65=0.9063077870366499 sin66=0.9135454576426009 sin67=0.9205048534524404 sin68=0.9271838545667873 sin69=0.9335804264972017 sin70=0.9396926207859083 sin71=0.9455185755993167 sin72=0.9510565162951535 sin73=0.9563047559630354 sin74=0.9612616959383189

sin75=0.9659258262890683 sin76=0.9702957262759965 sin77=0.9743700647852352 sin78=0.9781476007338057 sin79=0.981627183447664 sin80=0.984807753012208 sin81=0.9876883405951378 sin82=0.9902680687415704 sin83=0.992546151641322 sin84=0.9945218953682733 sin85=0.9961946980917455 sin86=0.9975640502598242 sin87=0.9986295347545738 sin88=0.9993908270190958 sin89=0.9998476951563913 sin90=1

cos1=0.9998476951563913 cos2=0.9993908270190958 cos3=0.9986295347545738 cos4=0.9975640502598242 cos5=0.9961946980917455 cos6=0.9945218953682733 cos7=0.992546151641322 cos8=0.9902680687415704 cos9=0.9876883405951378 cos10=0.984807753012208 cos11=0.981627183447664 cos12=0.9781476007338057 cos13=0.9743700647852352

cos14=0.9702957262759965 cos15=0.9659258262890683 cos16=0.9612616959383189 cos17=0.9563047559630355 cos18=0.9510565162951535 cos19=0.9455185755993168 cos20=0.9396926207859084 cos21=0.9335804264972017 cos22=0.9271838545667874 cos23=0.9205048534524404 cos24=0.9135454576426009 cos25=0.9063077870366499 cos26=0.898794046299167 cos27=0.8910065241883679 cos28=0.882947592858927 cos29=0.8746197071393957 cos30=0.8660254037844387 cos31=0.8571673007021123 cos32=0.848048096156426 cos33=0.838670567945424 cos34=0.8290375725550417 cos35=0.8191520442889918 cos36=0.8090169943749474 cos37=0.7986355100472928 cos38=0.7880107536067219 cos39=0.7771459614569709 cos40=0.766044443118978 cos41=0.754709580222772 cos42=0.7431448254773942 cos43=0.7313537016191705

cos44=0.7193398003386512 cos45=0.7071067811865476 cos46=0.6946583704589974 cos47=0.6819983600624985 cos48=0.6691306063588582 cos49=0.6560590289905074 cos50=0.6427876096865394 cos51=0.6293203910498375 cos52=0.6156614753256583 cos53=0.6018150231520484 cos54=0.5877852522924731 cos55=0.5735764363510462 cos56=0.5591929034707468 cos57=0.5446390350150272 cos58=0.5299192642332049 cos59=0.5150380749100544 cos60=0.5000000000000001 cos61=0.4848096202463371 cos62=0.46947156278589086 cos63=0.4539904997395468 cos64=0.43837114678907746 cos65=0.42261826174069944 cos66=0.4067366430758004 cos67=0.3907311284892737 cos68=0.3746065934159122 cos69=0.35836794954530015 cos70=0.3420201433256688 cos71=0.32556815445715675 cos72=0.30901699437494745 cos73=0.29237170472273677

cos74=0.27563735581699916 cos75=0.25881904510252074 cos76=0.24192189559966767 cos77=0.22495105434386514 cos78=0.20791169081775923 cos79=0.19080899537654491 cos80=0.17364817766693041 cos81=0.15643446504023092 cos82=0.13917310096006546 cos83=0.12186934340514749 cos84=0.10452846326765346 cos85=0.08715574274765836 cos86=0.06975647374412523 cos87=0.052335956242943966 cos88=0.03489949670250108 cos89=0.0174524064372836 cos90=0 tan1=0.017455064928217585 tan2=0.03492076949174773 tan3=0.052407779283041196 tan4=0.06992681194351041 tan5=0.08748866352592401 tan6=0.10510423526567646 tan7=0.1227845609029046 tan8=0.14054083470239145 tan9=0.15838444032453627 tan10=0.17632698070846497 tan11=0.19438030913771848 tan12=0.2125565616700221 tan13=0.2308681911255631

tan14=0.24932800284318068 tan15=0.2679491924311227 tan16=0.2867453857588079 tan17=0.30573068145866033 tan18=0.3249196962329063 tan19=0.34432761328966527 tan20=0.36397023426620234 tan21=0.3838640350354158 tan22=0.4040262258351568 tan23=0.4244748162096047 tan24=0.4452286853085361 tan25=0.4663076581549986 tan26=0.4877325885658614 tan27=0.5095254494944288 tan28=0.5317094316614788 tan29=0.554309051452769 tan30=0.5773502691896257 tan31=0.6008606190275604 tan32=0.6248693519093275 tan33=0.6494075931975104 tan34=0.6745085168424265 tan35=0.7002075382097097 tan36=0.7265425280053609 tan37=0.7535540501027942 tan38=0.7812856265067174 tan39=0.8097840331950072 tan40=0.8390996311772799 tan41=0.8692867378162267 tan42=0.9004040442978399 tan43=0.9325150861376618

tan44=0.9656887748070739 tan45=0.9999999999999999 tan46=1.0355303137905693 tan47=1.0723687100246826 tan48=1.1106125148291927 tan49=1.1503684072210092 tan50=1.19175359259421 tan51=1.234897156535051 tan52=1.2799416321930785 tan53=1.3270448216204098 tan54=1.3763819204711733 tan55=1.4281480067421144 tan56=1.4825609685127403 tan57=1.5398649638145827 tan58=1.6003345290410506 tan59=1.6642794823505173 tan60=1.7320508075688767 tan61=1.8040477552714235 tan62=1.8807264653463318 tan63=1.9626105055051503 tan64=2.050303841579296 tan65=2.1445069205095586 tan66=2.246036773904215 tan67=2.355852365823753 tan68=2.4750868534162946 tan69=2.6050890646938023 tan70=2.7474774194546216 tan71=2.904210877675822 tan72=3.0776835371752526 tan73=3.2708526184841404

tan74=3.4874144438409087 tan75=3.7320508075688776 tan76=4.0107809335358455 tan77=4.331475874284153 tan78=4.704630109478456 tan79=5.144554015970307 tan80=5.671281819617707 tan81=6.313751514675041 tan82=7.115369722384207 tan83=8.144346427974593 tan84=9.514364454222587 tan85=11.43005230276132 tan86=14.300666256711942 tan87=19.08113668772816 tan88=28.636253282915515 tan89=57.289961630759144 tan90=(无限)


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