求值sin29/6π cos31/4π tan(-1560°)
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求值sin29/6π cos31/4π tan(-1560°)
求值sin29/6π cos31/4π tan(-1560°)
求值sin29/6π cos31/4π tan(-1560°)
sin29/6π cos31/4π tan(-1560°)
=sin(4π+5/6π) cos(8π-1/4π )tan(-5*360°+240°)
=sin5/6π cos1/4π tan240°
=sin(π-1/6π) cos1/4π tan(180°+60°)
=sin1/6π cos1/4π tan60°
=1/2*√2/2*√3
=√6/4
求值sin29/6π cos31/4π tan(-1560°)
求值(1)sin29/6π(2)cos31/4π(3)tan(-1560°)
sin29π/6+cos(-29π/3)+tan(-25π/4)要求是求值
sin29π/6+cos(-29π/3)+tan(-25/4)
sin29-sin31/cos29-cos31的值为
sin29/6π+COS(-29/3π)+tan(-25/4π)答案拜托了各位
求值:sin29π|9cos4π|9+sin41π|18cos19π|18哥哥,姐姐们帮帮小弟……
sin(-14π/3)+cos31π/6+tan(-53π/6)
如果cos31°=α,则sin29°tan149°=
1.sin(-27π/4)得正弦数值 2.cos(-79π/6)的余弦值 3.cos31π/6的余弦值
(3)sin29π/9cos4π/9+sin41π/18cos19π/18
(3)sin29π/9cos4π/9+sin41π/18cos19π/18
sin(-π/4)求值
cos(-29兀/3)+tan(-25兀/4)+sin29兀/6的化简过程?
sin(-7π/6)求值
sin(-4分之π)求值
sin 11π/4 求值
cos31是多少