y=sin(2x+4/π)y=2sin(2/x+2/π）的单调增减区间要过程详细

证明sinx+siny+sinz-sin(x+y+z)=4sin((x+y)/2)sin((x+y)/2)sin((x+y)/2) 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) y=[sin^2(x)]*[sin^2(x)]求导 判断单调性 y=sin(x-π/6) y=sin(-2x+π/3) y=(sin x + COS x)^2 求y=sin[sin(x^2)]的导数 3sin^2x+-2sin^2y=2sinx sin^2x+-sin^2y=? sin(x+y)sin(x-y)=k,求cos^2x-cos^2y y=|sin(2x+π/4)|+2的周期 y=4sin^2πx的周期是多少 y=2sin三分之一x y=4sin(x-π/3) y=sin(2x+π/6) y=3sin(1/2x-π/4) 的周期各是多少, 求函数y=2sin(π/4-x)和y=2sin(x-π/4)的单调区间 y=-2Sin(x+π/4)的图像和y=2Sin(x+π/4)的关系,急! y =sin(2x-1)求导! y=sin(2x+a)(0 y=|sin 2x| 周期 y=e^[(sin^2)x]求导! y=sin(2x+a)（0