正弦：sin α=∠α的对边/∠α 的斜边
  余弦：cos α=∠α的邻边/∠α的斜边
  正切：tan α=∠α的对边/∠α的邻边
余切：cot α=∠α的邻边/∠α的对边
cos72=[(√5)-1]/4（利用黄金等腰三角形可得出）
  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
三角函数查询表  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

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