化简：f(x)=sin(x)cos(x)/sin(2x)

求导f(x) = cos(3x) * cos(2x) + sin(3x) * sin(2x). 化简!f(x)=sin(pai-x)cos(3/2pai+x)+sin(pai+x)sin(3/2pai-x) 化简f(x)=2cos(x/2)·(sin(x/2)+cos(x/2))-1 f(x)为奇函数,x>0,f(x)=sin 2x+cos x,则x 已知tan=2,求(cos x+sin x)/(cos x-sin x)+sin^2x 化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x) 化简 cos^2(x)*sin^2(x)-sin^2(x) 化简 cos^(2)(x)*sin^(2)(x)-sin^(2)(x) 已知函数f(x)=2cos x sin(x+pai/6)-sin^2x+cos^2x. 已知函数f(x)=cos^4 x－2sin x cos x－sin^4 x 已知函数f(x)=sin平方+根号3 sin x cos x+2cos平方x,x∈R f(x)=2cos*sin(x+π/3)-^3sin^2x+sinx*cosx