cos 2x -(cos 2x)^3怎么算出(sin 2x)^2 *cos 2x
(sin^2x+cos^2x )(sin^2x-cos^2x)怎么得sin^2x-cos^2x?
cos 2x /sin^2 x*cos^2 x不定积分
2cos x (sin x -cos x)+1
求导f(x) = cos(3x) * cos(2x) + sin(3x) * sin(2x).
化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x)
化简 1/2cos x-根号3/2sin x 根3sin x+cos x
证明sin^2(x)+cos^2(x+30)+sin(x)cos(x+30)=3/4
已知tan=2,求(cos x+sin x)/(cos x-sin x)+sin^2x
lim(sin(x^2*cos(1/x)))/x怎么做?
∫sin(x) cos^2(x)dx
f(x)=cos(2x-派/3)-2sin x*cos (派/2+x)
已知函数f(x)=cos(2x-π/3)+sin^2 x-cos^2 x