化简√3sin(-1200°)tan11π/6-cos585°tan(-37π/4)=
确定cos7/12π,sin(-465°),tan11/3π,sin3*cos4*tan5的符号
求下列函数值:根号3sin(-1200°)cos35/3派-cos585°tan(-3派/4)
tan11π/*6cos(-25π/6)*sin(-23π/6)
SIN(-7/6π),cos(15/4π),tan(-8/3π),tan(33/4π)
已知α∈(0,π|2),2tanα+3sinβ=7,且tanα-6sinβ=1,求sinα的值
sin(-21π/4) cos(-20π/3) tan(-19π/6)=
tan(-11π/6)、sin(-16π/3)、cos120°、cos(-180°-β)的求解过程.
化简sin(3π+a)tan(a-π)cot(π+a)/tan(2π-a)cos(π-a)
sin(2a+π/4)化简成tan
化简sin³(﹣α)cos(2π+α)tan(2π-α)/sin(α-2π)cos(α-3π/2)-tan(π
已知tan(α+π/4)=3,求cosα+2sinα/cosα-sinα的值
化简2cos*2-1 / 2tan(π/4-x)sin*2(π/4+x)