三角函数计算公式及查询表

画图、开磨床、做模具，做加工总是要算这个。有时总是去百度，今天小编给大家整理了关于函数的计算方法，这应该对从事模具行业的你有所帮助，不会的赶紧学学吧。真记不完就收藏！

角函数的关系

(正弦) Sin θ = 对边A / 斜边C

(余弦) Cosθ = 邻边B / 斜边C

(正切) Tanθ = 对边A / 邻边B

对边A = 斜边C * Sinθ

对边A = 邻边B * Tanθ

邻边B = 斜边C * Cosθ

邻边B = 对边A / Tanθ

斜边C = 对边A / Sinθ

斜边C = 邻边B / Cosθ

一般车床锥度与三角函数的关系

锥度比T=(大径D-小径d) / (长度L)

Tanθ= (大径D-小径d) / (2*长度L )

D= d + 2*L* Tanθ

d= D - 2*L* Tanθ

θ= Tan - ( (D-d) / 2L )

这里为你提供了sin,cos,tan不同角度的表值，精确度也很高了，相信对你有用

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