y(x) = x^2×sin(x^2-x-2),怎么用matlab写出表达式啊?谢谢

y=(sin x + COS x)^2 y=x^2*sin(x^2-x-2),-2 求导：y=x-sin(x/2)cos(x/2). y=2cos x (sin x+cos x) y=[sin^2(x)]*[sin^2(x)]求导 y=1-x^2 x>=0 ,y=sin|x|/x x 化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x) sin(x+y)sin(x-y)=k,求cos^2x-cos^2y 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 =(cos^2) x - sin (3^x),求y' y=sin平方x+2x求y' 6-4x-x^2=5/|sin(y/x)cos(y/x)|的解 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 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?