若cos2x/sin(x-兀)=-(√2)/2,则cosx+sinx的值为
若cos2x/sin(x-π/4)=-√2/2,则cosx+sinx的值为?
若(cos2x)/[sin(x-π/4)]=-√2/2,则cosx+sinx的值为______
若cos2x/sin(x-派/4)=-√2/2,则cosx+sinx的值为?
若cos2x/sin(π/4-x)=-根号2/2,则sinx+cosx的值是
已知sinx=1/2+cosx,则cos2x/√2sin(x+π/4)的值为
cos2x/sin{x-π/4}=-根号2/2求cosx+sinx的值
若(cos2x)/[sin(x-π/4)]=(-根号2)/2,则cosx+sinx=?
若cos2X/sin(X—45度)=根号2/2 则cosX+sinX?
已知sinx=1/2+cosx,且a在(0,π/2),则cos2x/sin(x-π/4)的值为?
已知函数y=f(x)=sin^2x+sinx*cosx+cos2x 求的最小
已知sinx=-1/2cosx,cosx-sinx/cosx+sinx+sin2x+cos2x的值
已知2sinx=cosx,求cos2x+cos2x+1/cos^2x的值.