maple画图implicitplot(y = (x-2*log(x))(x+cos(x)),x = -3 ..3,y

matlab中如何画图!x=-pi:0.1:pi; y=cos(x)/cos(2*x);plot(x.y) y =(cos^2) x - sin (3^x),求y' matlab画图x = 0:0.01:10; y =sin(2*x)*cos(100*x)/(2*x); plot(x, MATLAB画图,y=sin(x)*(cos(x)-1)/((2*sin(x.^2)+4*cos(x)).^0.5)-( 画图：1:y=｜x^2-2x-3 ｜ 2:y=2^｜x ｜-1 化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x) y=e的X次方+cos x-log a的x次方 求y' Sin x-sin y=2/3 cos x-cos y=1/2 求cos(x-y) log(2x)+log(3y)-log(2z) 怎么化简? log3(x^2-2x-6)=2 log(3x+6)=1+l maple plot([f(x),f(x)+2,f(x)+4,f(x)+6],x = -10 ..10,y = -10 请画出下列图像：log 1/2 （-x） y=log 1/3 /x/ y=cos^3(2x)+e^x求导数