化简f(x)=-sin(2x-7∏)cos(2x+4∏)=
求导f(x) = cos(3x) * cos(2x) + sin(3x) * sin(2x).
化简f(x)=2cos(x/2)·(sin(x/2)+cos(x/2))-1
已知函数f(x)=cos^4 x-2sin x cos x-sin^4 x
化简下面的三角函数f(x)=sin^2x+2√3sin(x+∏/4)cos(x-∏/4)-cos^2-√3
化简!f(x)=sin(pai-x)cos(3/2pai+x)+sin(pai+x)sin(3/2pai-x)
f(x)为奇函数,x>0,f(x)=sin 2x+cos x,则x
化简f(x)=(1+√2*cos(2x-π/4))/sin(π/2-x)
f(x)=2SIN^2(x+π\4)-cos(2x+π\6) 化简 谢
已知f(x)=cos^4x-2根号3sinxcosx-sin^4x 化简
f(x)=(1+cos2x)/[4sin(pai/2+x)]-asin(x/2)cos(pai-x/
已知函数f(x)=-4cos^2 x+4√(3)sin x cos x+5,x属于R
已知f(x)=cos^2x+sinxcosx g(x)=2sin(x+π/4)sin(x-π/4)