cos(-x)化简是-COS(X) SIN(-X)是SIN(X)
sin(sin(sin(sin(x)=cos(cos(cos(cos(x),X等于多少?
sin(-x) cos(-x)等于多少
(急)数学化简题根号3 sin x+cos x1-2sin2 x+sin x cos x注:sin2 x是sin平方x
证明COS(X+Y)COS(X-Y)=COS^2X-SIN^2Y
化简(1)√3sin x+cos x (2)√2(sin x-cos x) (3)√2cos x-√6sin x
化简sin(2π+x)cos(π-x)sin(π-x)/cos(x-π)sin(-π-x)sin(π+x)
e^sin x(xcos x-(sin x/cos²x))的不定积分怎么算
sin x(sin x+cos x)=1求x等于多少
cos(x+y)sinx-sin(x+y)cosx
cos(x+y)=?sin(x+y)=?
sinx/(sin^3x+cos^3x)dx不定积分
∫(cos2x/cos方x*sin方x)dx