化简sin(2x-y)*sin y+cos(2x-y)*sin y

化简sin(2x-y)*sin y+cos(2x-y)*sin y sin(2x+y)/sinx-2cos(x+y) 化简 化简sin^2x+sin^2y-sin^2xsin^2y+cos^2xcos^2y sin(x.y)中, sin(x)^y求导 一道三角恒等式证明题请证明sin(x+y)sin(x-y)=sin^2(x)-sin^2(y) 化简:sin(x+y)cosx-1/2[sin(2x+y)-siny] 化简sin(x+y)sin(x-y)-cos(x+y)cos(x-y)的结果是? 化简sin(x+y)cos(x-y)+cos(x+y)sin(x-y) y=[sin^2(x)]*[sin^2(x)]求导 化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x) 求证sin²x-sin²y=sin(x+y)sin(x-y) y=(sin x + COS x)^2 求y=sin[sin(x^2)]的导数 化简y=sin^2 x + cos 2x 求周期sin^2 x 是平方 3sin^2x+-2sin^2y=2sinx sin^2x+-sin^2y=? sin(x+y)sin(x-y)=k,求cos^2x-cos^2y 化简y=(cos x)^2+sin x -2 谢谢