sin(α+4/π)+sin(α-4/π)=3/根号下2
(cos2α)/sin(α-π/4)=-根号下2/2,则cosα+sinα的值
已知sin(π+α)=根号3/2,求sin(3/4π-α)
cos2α/[sin(α-π/4)]=-根号2 /2,cosα+sinα=?
sin(3π-α)=根号
根号sin^α-sin^4α(π/2〈α〈π)化简
已知sin(a+π/3)+sina=-(4倍根号下3)/5,-π/2
已知sin(π/4+α)+sin(π/4-α)=根号2/3,(1)求sinα(2)求sin(α-π/4)/1-sin2α
已知sin (α+派/3)+sinα=-4根号3/5,-派/2
若α属于[0,2π),根号下(1-cos^2α)+根号下(1-sin^2α)=sinα-cosα
cos2α/sin(α-π/4)=-根号2/2,则cosα+sinπα等于什么
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)=