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