关于高一数学问题

1.
f(X)=2msin^2x-2根号3msinxcosx +n
````=-m(1-2sin^2x)+ m-√3m(2sinxcosx) +n
````=-mcos2x-√3msin2x+ m+ n
````=-2m(1/2cos2x +√3/2sin2x) +m +n
````=-2msin(2x +30)+ m +n

2.
f(X)=2根号3sin^2x +sin2x-根号3
````=-√3(1-2sin^2x) +√3 +sin2x-√3
````=sin2x-√3cos2x
````=2(1/2sin2x-√3/2cos2x)
````=2sin(2x-60)

1.
f(x)=2m(cosx)^2-m-3^0.5×2msinxconx+m+n
=mcos2x-3^0.5×msin2x+m+n
=2m(1/2×cos2x-3^0.5/2×sin2x)+m+n
=2mcos(π/3+2x)+m+n

以前经常做 现在不知道！！！