y=sin^2x+sinxcoswx+cos^2x 化简

y=sin^2x+sinxcoswx+cos^2x 化简 C语言求三角函数f(x,y,z)=sin(x)/(sin(x-y)*sin(x-z))+sin(y)/(sin(y-x)*sin(y-z))+sin(z)/(sin(z-x)*sin(z-y))代码#include #include double fun(double x,double y,double z){double a,b,c,sum;a=sin(x)/(sin(x-y)*sin(x-z));b=sin(y)/(sin(y-x)*sin(y-z));c 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 y=(sin x + COS x)^2 sin(x+y)sin(x-y)=k,求cos^2x-cos^2y 下列函数中,既为偶函数又在(0,π/2)内递增且是周期函数的是A y=sin x B y=cos x C y=sin|x| D y=|sin x| 求y=sin[sin(x^2)]的导数 (y')^2 = y^4 - y^2答案是y(x) = 1/sin(∏/6±x),恒为0的不算 其实是通解啦y(x) = C/sin(∏/6±x),C为常数 3sin^2x+-2sin^2y=2sinx sin^2x+-sin^2y=? 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 求证sin²x-sin²y=sin(x+y)sin(x-y) tan(x+y)tan(x-y)=sin^2x-sin^2y/cos^2x-sin^2y 顺便问一下. tan,sin,cos是什么意思? 证明sinx+siny+sinz-sin(x+y+z)=4sin((x+y)/2)sin((x+y)/2)sin((x+y)/2)