已知sin(π/6-θ)=根号2/3,-5π/6
已知sin(π/6-θ)=根号2/3,-5π/6
已知sin(π/6+a)=(根号3)/3,求sin(2π/3+a)?
已知cos(α-π/6)+sinα=4/5 根号3,则sin(α+7/6π)=?
已知cos(α-π/6)+sinα=(4倍根号3)/5,则sin(α+7π/6)=
已知sin(a+π/6)+cosa=4/5倍根号3,则sin(a+π/3)=
(1)已知cos[(π/3)-a]=根号3/3,求sin[5π/6)-a]+sin^2[(2π/3)+a]的值
1.化简根号2cos x - 根号6sin x2.已知sin(α-β)cosα-cos(β-α)sinα=3/5,β是第
已知sin(π+α)=根号3/2,求sin(3/4π-α)
已知函数f(x)=2根号3sin平方x-sin(2x-π/3)
已知β∈(3π/2,2π),化简根号(1=sinβ)-根号(1-sinβ)
已知f(x)=sin(2x+π/3)-根号3sin^2x+sinxcosx+根号3/2
已知sinθ+cosθ=根号2/3(π/2