y=sinx+sin|x|

证明sin(x+y)sin(x-y)=sinx-siny 证明sinx+siny+sinz-sin(x+y+z)=4sin((x+y)/2)sin((x+y)/2)sin((x+ y=|sinx|,y=sin|x| 作出下列图像 设y=sinx²+sin²x,求y' 证明 [sin(2x+y)/sinx]-2cos(x+y)=siny/sinx 求证：sin(2x+y)/sinx-2cos(x+y)=siny/sinx 证明sin(x+y)sin(x-y)=（sinx）^2-(siny）^2. 函数y=sin(π/2-x)+sinx的最大值 求函数z=sinx+siny+sin(x+y)(0 求sin(x+y)=sinx+siny的导数 函数y=|sinx|-sin|x|的值域是 y=sin^2x+sinx单调递增区间