sin x 3 cos x =2怎么解?
求导f(x) = cos(3x) * cos(2x) + sin(3x) * sin(2x).
y=sin^2(x)+2sin(x)cos(x)+3cos^2(x)的最值 用向量解
化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x)
证明sin^2(x)+cos^2(x+30)+sin(x)cos(x+30)=3/4
(sin^2x+cos^2x )(sin^2x-cos^2x)怎么得sin^2x-cos^2x?
已知tan=2,求(cos x+sin x)/(cos x-sin x)+sin^2x
怎么用MATLAB解超越方程cos(x)-2*x*sin(x)-x-0.5*sin(x)*cosh(x)/sinh(x)
cos^2 x - sin^2 x 是怎么化简=cos 2x
已知向量a=(cosωx-sinωx,sinωx),b=(-cosωx-sinωx,2√ 3cosωx),
已知函数f(x)=sin平方+根号3 sin x cos x+2cos平方x,x∈R
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