cosπ|3-tanπ|4+3|4tan²π|6+cos²π|6-sinπ|4
cosπ/3+tanπ/4+3tan²π/6+sinπ/2+cosπ+sin3π/2等于?.
已知tanα/2=2,1.求tan(α+π/4)的值 2.(6sinα+cosα)/(3sinα-2cosα)的值
已知tanα/2=2求tan(α+π/4)的值(6sinα+cosα)/(3sinα-2cosα)的值
SIN(-7/6π),cos(15/4π),tan(-8/3π),tan(33/4π)
sin(4π/3)*cos(25π/6)*tan(-3π/4)
sin(-4π/3)cos(-23π/6)tan(25π/4)=?
sin(-21π/4) cos(-20π/3) tan(-19π/6)=
tan(a-4π)cos(π+a)sin^2(a+3π)/tan(3π+a)cos^2(2/5π+2)=0.5,求tan
求值sin25π/6+cos25π/3+tan(-25π/4)+sin(-7π/3)×cos(-13π/6)-sin(-
求证:1-2sinαcosα/cos²α-sin²α=tan(π/4-α)
求证(1-2sinαcosα)/(cos²α-sin²α)=tan(π/4-α)
已知tan(α+π/4)=3,求cosα+2sinα/cosα-sinα的值