cos60度等于多少啊？cos60度=1/2。cos60°表示在一个直角三角形中，角度为60°的角，它的邻边与斜边之比。三角形ABC角ACB=90度，角CAB=60度，连接CD，又直角三角新斜边上中点=斜边一半，知：CD=AD，有角A=60度，故三角形ACD为等边三角形，AC=AD=1/2。所以，cos60度=AC/AB=AD/AB=1/2。

根据三角函数公式，还可以求出sin60°=√3/2，tan60°=√3。cos60°^2+sin60°^2=1。

常用三角函数值：

sin0=sin0°=0

cos0=cos0°=1

tan0=tan0°=0

sin15=0.650；sin15°=（√6-√2）/4

cos15=-0.759；cos15°=（√6+√2）/4

tan15=-0.855；tan15°=2-√3

sin30=-0.988；sin30°=1/2

cos30=0.154；cos30°=√3/2

tan30=-6.405；tan30°=√3/3

sin45=0.851；sin45°=√2/2

cos45=0.525；cos45°=sin45°=√2/2

tan45=1.620；tan45°=1

sin60=-0.305；sin60°=√3/2

cos60=-0.952；cos60°=1/2

tan60=0.320；tan60°=√3

sin75=-0.388；sin75°=cos15°

cos75=0.922；cos75°=sin15°

tan75=-0.421；tan75°=sin75°/cos75°=2+√3

sin90=0.894；sin90°=cos0°=1

cos90=-0.448；cos90°=sin0°=0

tan90=-1.995；tan90°不存在

sin105=-0.971；sin105°=cos15°

cos105=-0.241；cos105°=-sin15°

tan105=4.028；tan105°=-cot15°

sin120=0.581；sin120°=cos30°

cos120=0.814；cos120°=-sin30°

tan120=0.713；tan120°=-tan60°

sin135=0.088；sin135°=sin45°

cos135=-0.996；cos135°=-cos45°

tan135=-0.0887；tan135°=-tan45°

sin150=-0.7149；sin150°=sin30°

cos150=-0.699；cos150°=-cos30°

tan150=-1.022；tan150°=-tan30°

sin165=0.998；sin165°=sin15°

cos165=-0.066；cos165°=-cos15°

tan165=-15.041；tan165°=-tan15°

sin180=-0.801；sin180°=sin0°=0

cos180=-0.598；cos180°=-cos0°=-1

tan180=1.339；tan180°=0

sin195=0.219；sin195°=-sin15°

cos195=0.976；cos195°=-cos15°

tan195=0.225；tan195°=tan15°

sin360=0.959；sin360°=sin0°=0

cos360=-0.284；cos360°=cos0°=1

tan360=-3.380；tan360°=tan0°=0

cos72度=[(√5)-1]/4（利用黄金等腰三角形可得出）

sin1=0.01745240643728351sin2=0.03489949670250097sin3=0.05233595624294383

sin4=0.0697564737441253sin5=0.08715574274765816sin6=0.10452846326765346

sin7=0.12186934340514747sin8=0.13917310096006544sin9=0.15643446504023087

sin10=0.17364817766693033sin11=0.1908089953765448sin12=0.20791169081775931

sin13=0.22495105434386497sin14=0.24192189559966773sin15=0.25881904510252074

sin16=0.27563735581699916sin17=0.2923717047227367sin18=0.3090169943749474

sin19=0.3255681544571567sin20=0.3420201433256687sin21=0.35836794954530027

sin22=0.374606593415912sin23=0.3907311284892737sin24=0.40673664307580015

sin25=0.42261826174069944sin26=0.4383711467890774sin27=0.45399049973954675

sin28=0.4694715627858908sin29=0.48480962024633706sin30=0.49999999999999994

sin31=0.5150380749100542sin32=0.5299192642332049sin33=0.544639035015027

sin34=0.5591929034707468sin35=0.573576436351046sin36=0.5877852522924731

sin37=0.6018150231520483sin38=0.6156614753256583sin39=0.6293203910498375

sin40=0.6427876096865392sin41=0.6560590289905073sin42=0.6691306063588582

sin43=0.6819983600624985sin44=0.6946583704589972sin45=0.7071067811865475

sin46=0.7193398003386511sin47=0.7313537016191705sin48=0.7431448254773941

sin49=0.7547095802227719sin50=0.766044443118978sin51=0.7771459614569708

sin52=0.7880107536067219sin53=0.7986355100472928sin54=0.8090169943749474

sin55=0.8191520442889918sin56=0.8290375725550417sin57=0.8386705679454239

sin58=0.848048096156426sin59=0.8571673007021122sin60=0.8660254037844386

sin61=0.8746197071393957sin62=0.8829475928589269sin63=0.8910065241883678

sin64=0.898794046299167sin65=0.9063077870366499sin66=0.9135454576426009

sin67=0.9205048534524404sin68=0.9271838545667873sin69=0.9335804264972017

sin70=0.9396926207859083sin71=0.9455185755993167sin72=0.9510565162951535

sin73=0.9563047559630354sin74=0.9612616959383189sin75=0.9659258262890683

sin76=0.9702957262759965sin77=0.9743700647852352sin78=0.9781476007338057

sin79=0.981627183447664sin80=0.984807753012208sin81=0.9876883405951378

sin82=0.9902680687415704sin83=0.992546151641322sin84=0.9945218953682733

sin85=0.9961946980917455sin86=0.9975640502598242sin87=0.9986295347545738

sin88=0.9993908270190958sin89=0.9998476951563913

sin90=1

cos1=0.9998476951563913cos2=0.9993908270190958cos3=0.9986295347545738

cos4=0.9975640502598242cos5=0.9961946980917455cos6=0.9945218953682733

cos7=0.992546151641322cos8=0.9902680687415704cos9=0.9876883405951378

cos10=0.984807753012208cos11=0.981627183447664cos12=0.9781476007338057

cos13=0.9743700647852352cos14=0.9702957262759965cos15=0.9659258262890683

cos16=0.9612616959383189cos17=0.9563047559630355cos18=0.9510565162951535

cos19=0.9455185755993168cos20=0.9396926207859084cos21=0.9335804264972017

cos22=0.9271838545667874cos23=0.9205048534524404cos24=0.9135454576426009

cos25=0.9063077870366499cos26=0.898794046299167cos27=0.8910065241883679

cos28=0.882947592858927cos29=0.8746197071393957cos30=0.8660254037844387

cos31=0.8571673007021123cos32=0.848048096156426cos33=0.838670567945424

cos34=0.8290375725550417cos35=0.8191520442889918cos36=0.8090169943749474

cos37=0.7986355100472928cos38=0.7880107536067219cos39=0.7771459614569709

cos40=0.766044443118978cos41=0.754709580222772cos42=0.7431448254773942

cos43=0.7313537016191705cos44=0.7193398003386512cos45=0.7071067811865476

cos46=0.6946583704589974cos47=0.6819983600624985cos48=0.6691306063588582

cos49=0.6560590289905074cos50=0.6427876096865394cos51=0.6293203910498375

cos52=0.6156614753256583cos53=0.6018150231520484cos54=0.5877852522924731

cos55=0.5735764363510462cos56=0.5591929034707468cos57=0.5446390350150272

cos58=0.5299192642332049cos59=0.5150380749100544cos60=0.5000000000000001

cos61=0.4848096202463371cos62=0.46947156278589086cos63=0.4539904997395468

cos64=0.43837114678907746cos65=0.42261826174069944cos66=0.4067366430758004

cos67=0.3907311284892737cos68=0.3746065934159122cos69=0.35836794954530015

cos70=0.3420201433256688cos71=0.32556815445715675cos72=0.30901699437494745

cos73=0.29237170472273677cos74=0.27563735581699916cos75=0.25881904510252074

cos76=0.24192189559966767cos77=0.22495105434386514cos78=0.20791169081775923

cos79=0.19080899537654491cos80=0.17364817766693041cos81=0.15643446504023092

cos82=0.13917310096006546cos83=0.12186934340514749cos84=0.10452846326765346

cos85=0.08715574274765836cos86=0.06975647374412523cos87=0.052335956242943966

cos88=0.03489949670250108cos89=0.0174524064372836

tan1=0.017455064928217585tan2=0.03492076949174773tan3=0.052407779283041196

tan4=0.06992681194351041tan5=0.08748866352592401tan6=0.10510423526567646

tan7=0.1227845609029046tan8=0.14054083470239145tan9=0.15838444032453627

tan10=0.17632698070846497tan11=0.19438030913771848tan12=0.2125565616700221

tan13=0.2308681911255631tan14=0.24932800284318068tan15=0.2679491924311227

tan16=0.2867453857588079tan17=0.30573068145866033tan18=0.3249196962329063

tan19=0.34432761328966527tan20=0.36397023426620234tan21=0.3838640350354158

tan22=0.4040262258351568tan23=0.4244748162096047tan24=0.4452286853085361

tan25=0.4663076581549986tan26=0.4877325885658614tan27=0.5095254494944288

tan28=0.5317094316614788tan29=0.554309051452769tan30=0.5773502691896257

tan31=0.6008606190275604tan32=0.6248693519093275tan33=0.6494075931975104

tan34=0.6745085168424265tan35=0.7002075382097097tan36=0.7265425280053609

tan37=0.7535540501027942tan38=0.7812856265067174tan39=0.8097840331950072

tan40=0.8390996311772799tan41=0.8692867378162267tan42=0.9004040442978399

tan43=0.9325150861376618tan44=0.9656887748070739tan45=0.9999999999999999

tan46=1.0355303137905693tan47=1.0723687100246826tan48=1.1106125148291927

tan49=1.1503684072210092tan50=1.19175359259421tan51=1.234897156535051

tan52=1.2799416321930785tan53=1.3270448216204098tan54=1.3763819204711733

tan55=1.4281480067421144tan56=1.4825609685127403tan57=1.5398649638145827

tan58=1.6003345290410506tan59=1.6642794823505173tan60=1.7320508075688767

tan61=1.8040477552714235tan62=1.8807264653463318tan63=1.9626105055051503

tan64=2.050303841579296tan65=2.1445069205095586tan66=2.246036773904215

tan67=2.355852365823753tan68=2.4750868534162946tan69=2.6050890646938023

tan70=2.7474774194546216tan71=2.904210877675822tan72=3.0776835371752526

tan73=3.2708526184841404tan74=3.4874144438409087tan75=3.7320508075688776

tan76=4.0107809335358455tan77=4.331475874284153tan78=4.704630109478456

tan79=5.144554015970307tan80=5.671281819617707tan81=6.313751514675041

tan82=7.115369722384207tan83=8.144346427974593tan84=9.514364454222587

tan85=11.43005230276132tan86=14.300666256711942tan87=19.08113668772816

tan88=28.636253282915515tan89=57.289961630759144

tan90=无取值范围