三角函数详细数值表.doc

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=斜边的对边ACosA=斜边的邻边ATanA=的邻边的对边 AA CotA=的对边的邻边 AA 还有一点很重要，还有一点很重要， 0 < sinA < 1根据三角函数的定义，我们还可以得出根据三角函数的定义，我们还可以得出ＳｉｎＡ＊ＳｉｎＡ＊２２＋＋ＣＣｏｓＡ＊ｏｓＡ＊２＝２＝１１ＴａｎＡＴａｎＡ ·· ＣｏｔＡ＝１ＣｏｔＡ＝１ＴａｎＡ＝ＳｉｎＡ／ＣｏｓＡＴａｎＡ＝ＳｉｎＡ／ＣｏｓＡＣｏｔＡ＝ＣｏｓＡ／ＳｉｎＡＣｏｔＡ＝ＣｏｓＡ／ＳｉｎＡＴａｎＡ＝１／ＣｏｔＡＴａｎＡ＝１／ＣｏｔＡsin A= cos（（90 - A））tan A =cotA（（90 - A））此为必背图表此为必背图表角度角度三角函数三角函数０度０度３０度３０度４５度４５度６０度６０度９０度９０度ｓｉｎｓｉｎ００１／２１／２ 22 23１１ｃｏｓｃｏｓ１１ 23 22１／２１／２００ｔａｎｔａｎ００ 33１１3――――ｃｏｔｃｏｔ――――3１１ 33００相对应的示意图见下页～～～～～～～～～～～～～～～～～相对应的示意图见下页～～～～～～～～～～～～～～～～～＜Ａ＝３０度＜Ａ＝３０度＜Ａ＝４５度＜Ａ＝４５度＜Ａ＝６０度＜Ａ＝６０度接下来如标题示，整理好的三角函数表接下来如标题示，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=√3/2sin135=√2/2sin150=1/2sin165=（√6-√2)/4sin180=0sin270=-1sin360=0（上为特殊值）（上为特殊值）sin1=0.01745 sin2=0.034899 sin3=0.052335sin4=0.069756sin5=0.087155sin6=0.104528 sin7=0.121869sin8=0.139173sin9=0.156434 sin10=0.17364 sin11=0.19080sin12=0.20791 sin13=0.22495sin14=0.24192sin15=0.25881 sin16=0.27563sin17=0.29237sin18=0.30901sin19=0.32556sin20=0.34202 sin21=0.35836 sin22=0.37460sin23=0.39073sin24=0.40673 sin25=0.42261sin26=0.43837sin27=0.45399 sin28=0.46947sin29=0.48480sin30=0.49999 sin31=0.51503sin32=0.52991sin33=0.54463 sin34=0.55919sin35=0.57357sin36=0.58778 sin37=0.60181sin38=0.61566sin39=0.62932sin40=0.64278sin41=0.65605sin42=0.66913 sin43=0.68199sin44=0.69465sin45=0.70710 sin46=0.71933 sin47=0.73135sin48=0.74314 sin49=0.75470 sin50=0.76604sin51=0.77714 sin52=0.78801sin53=0.79863sin54=0.80901sin55=0.81915sin56=0.82903sin57=0.83867sin58=0.84804sin59=0.85716sin60=0.86602 sin61=0.87461sin62=0.88294sin63=0.89100 sin64=0.89879sin65=0.90630sin66=0.91354 sin67=0.92050sin68=0.92718sin69=0.93358sin70=0.93969sin71=0.94551sin72=0.95105 sin73=0.95630sin74=0.96126sin75=0.96592 sin76=0.97029sin77=0.97437sin78=0.97814 sin79=0.98162sin80=0.98480sin81=0.98768 sin82=0.99026sin83=0.99254sin84=0.99452 sin85=0.99619sin86=0.99756sin87=0.99862 sin88=0.99939sin89=0.99984sin90=1 cos1=0.99984cos2=0.99939cos3=0.99862 cos4=0.99756cos5=0.99619cos6=0.99452cos7=0.99254cos8=0.99026cos9=0.98768 cos10=0.9848cos11=0.9816cos12=0.97814 cos13=0.9743cos14=0.9702cos15=0.9659 cos16=0.9612cos17=0.9563cos18=0.9510 cos19=0.9455cos20=0.9396 cos21=0.9335 cos22=0.9271cos23=0.9205cos24=0.9135cos25=0.9063cos26=0.8987cos27=0.8910 cos28=0.8829cos29=0.8746cos30=0.8660 cos31=0.8571cos32=0.8480cos33=0.8386 cos34=0.8290cos35=0.8191cos36=0.8090 cos37=0.7986cos38=0.7880cos39=0.7771 cos40=0.7660cos41=0.7547cos42=0.7431cos43=0.7313cos44=0.7193cos45=0.7071cos46=0.6946cos47=0.6819cos48=0.6691cos49=0.6560cos50=0.6427cos51=0.6293 cos52=0.6156 cos53=0.6018 cos54=0.5877 cos55=0.5735cos56=0.5592 cos57=0.5446 cos58=0.5299cos59=0.5150 cos60=0.5000 cos61=0.4848cos62=0.4694cos63=0.4539cos64=0.4383cos65=0.4226cos66=0.4067cos67=0.3907cos68=0.3746cos69=0.3583cos70=0.3420cos71=0.3255cos72=0.3090 cos73=0.2923cos74=0.2756cos75=0.2588cos76=0.2419cos77=0.2249cos78=0.2079cos79=0.1908cos80=0.1736 cos81=0.1564 cos82=0.1391cos83=0.1218cos84=0.1045cos85=0.0871cos86=0.06973cos87=0.052 cos88=0.0348cos89=0.0174cos90=0 tan1=0.017455tan2=0.034920tan3=0.052407 tan4=0.069926tan5=0.087488tan6=0.105104 tan7=0.122784tan8=0.140540tan9=0.158384 tan10=0.17632 tan11=0.19438tan12=0.21255 tan13=0.23086 tan14=0.24932tan15=0.26794 tan16=0.28674tan17=0.30573 tan18=0.32491 tan19=0.34432tan20=0.36397 tan21=0.38386 tan22=0.40402tan23=0.42447tan24=0.44522 tan25=0.46630tan26=0.48773an27=0.50952 tan28=0.53170tan29=0.55430tan30=0.57735 tan31=0.60086tan32=0.62486tan33=0.64940 tan34=0.67450tan35=0.70020tan36=0.72654tan37=0.75355tan38=0.78128tan39=0.80978 tan40=0.83909 tan41=0.86928tan42=0.90040 tan43=0.93251tan44=0.96568tan45=0.99999tan46=1.03553tan47=1.07236tan48=1.11061 tan49=1.15036tan50=1.19175 tan51=1.23489 tan52=1.27994tan53=1.32704tan54=1.3763tan55=1.42814 tan56=1.48256tan57=1.53986 tan58=1.60033tan59=1.66427 tan60=1.73205tan61=1.80404tan62=1.88072tan63=1.96261tan64=2.05030tan65=2.14450tan66=2.24603 tan67=2.35585tan68=2.47508tan69=2.60508 tan70=2.74747 tan71=2.90421tan72=3.07768tan73=3.27085tan74=3.48741tan75=3.73205 tan76=4.01078tan77=4.33147tan78=4.70463 tan79=5.14455tan80=5.67128tan81=6.31375tan82=7.11536tan83=8.14434tan84=9.51436tan85=11.4300tan86=14.3006tan87=19.0811 tan88=28.6362tan89=57.2899tan90=无取值如果求精确度的话，还可以看下面如果求精确度的话，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=0.22495105434386497sin14=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。