f(x)=(2cos^2 a/2-sina-1)/(sin(a+π/3)sin(a-π/3)

.若f(x)=sinα－cosx,则f′(α)等于 A.sinα B.cosα C.sinα+cosα D.2sinα f'(sin^2x)=cos^2x,求f(x)f'((sin^x)^2)=(cos^x)^2 当x=a时,f（x）=sin x - 2cos x取得最大值,则cos a =? f(x)=cos(2x)+2sin(x)化简 如果f(x)=sin(x+a)+2cos(x+a)是奇函数,则tana=? f(x)=sin(x+a)-2cos(x-a)是偶函数求cos2a f(x)=a(cos^2 x+sin xcos x)+b,求当a 函数f(x)=负根号3sin ^2x+sin x cos x f(a/2)=1/4-根号3/2求sin a值 函数f(x)=√a*cos(2x-θ)-sin(2x-θ)(0 f(sin x)=3-cos 2x,求f(cos x)=? 设f(sin x)=3-cos 2x,则f(cos x）=? 若F(sin x)=3-cos 2x 则F（cos x）=? f(sin x)=cos 2x +1 求 f(cos x) f(sin x)=3-cos 2x求f(cos x) f(cos x)=2-sin 2x,则f(sin x)=? f(x)=2sin(x+a/2)cos(x+a/2)+2根号3cos^2(x+a/2)-根号3求f(x)周期若0 若f(cos x)=cos 2x,则f(sin 15度）的值? 已知f(tan x)=sin 2x,若a属于(0,TT/2),求满足f(sin a)>f(cos a)的a的取值范围