sin(x.y)中,

sin(x.y)中, sin(x)^y求导 y=sin(x+y)求导中 1-cos(x+y) 如何得出来的 求证sin²x-sin²y=sin(x+y)sin(x-y) 下列函数中是奇函数的是（ ）A y=-|sin x|B y=sin（-|x|）C y=sin|x|D y=x·sin|x| matlab中语句f=@(x,y)exp(-x.^2/3).*sin(x.^2+2*y)中@(x, Mathematica y''+ sin(x) y=x matlab中一些新手问题,syms x y;y =ezplot('1/5*(-2-5/(-125+100*sin(x))*(-20*sin(x)+40+10*(-121*sin(x)^2-100*sin(x)+121+100*sin(x)^3)^(1/2))+5/2*sin(x)/(-125+100*sin(x))*(-20*sin(x)+40+10*(-121*sin(x)^2-100*sin(x)+121+100*sin(x)^3)^(1/2)))*cos(x) 证明sin(x+y)sin(x-y)=sinx-siny matlab中为什么有的算式中要加点号例如 f=@(x,y)x.^2.*y+sin(x).*cos(y) y=sin根号x y=sinx+sin|x| sin(x+y)的导数 化简sin(2x-y)*sin y+cos(2x-y)*sin y 下列函数中最小值为2的函数是?)A.y=sin^2x+1/sin^2x(0 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| 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)