f(x)=sin(x+a)-2cos(x-a)是偶函数求cos2a

f(x)=cos(2x)+2sin(x)化简 如果f(cos x)=sin 3x,那么f(sin x)等于A.sin 3x B.-sin 3x Ccos 3x D-cos 3x f'(sin^2x)=cos^2x,求f(x)f'((sin^x)^2)=(cos^x)^2 f(x)为奇函数,x>0,f(x)=sin 2x+cos x,则x 当x=a时,f（x）=sin x - 2cos x取得最大值,则cos a =? 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)=√a*cos(2x-θ)-sin(2x-θ)(0 已知f(x)=cos(x/2)[sin(x/2)-cos(x/2)],其导为? f(x)=cos(2兀-x)cos(2/兀-x)-sin方x化简速求 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 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)=1-cos x 求f''(x) 化简：f(x)=sin(x)cos(x)/sin(2x) f(sin x)=cos 2x +1 求 f(cos x)