化简sin(x)(cos(x)+cos(3x)+cos(5x)+cos(7x))

化简sin(x)(cos(x)+cos(3x)+cos(5x)+cos(7x)) sin（sin（sin（sin（x）=cos（cos（cos（cos（x）,X等于多少? 化简 1/2cos x-根号3/2sin x 根3sin x+cos x 化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x) 化简sin(3π-x)cos(x-3/2)cos(4π-x)/tan(x-5π)cos(π/2+x)sin(x-5/2π 根号3sin x+cos x要化简 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). sin(1/x)-cos(1/x)/x (x*sin x*cos x)的导数 化简[1-(sin^4x-sin^2cos^2x+cos^4x)/(sin^2)]+3sin^2x