在matlab中这条语句为什么执行错误?A=sym('sin(x)cos(y)+sin(y)cos(x)');

在matlab中这条语句为什么执行错误?A=sym('sin(x)cos(y)+sin(y)cos(x)'); Matlab编程问题 cos(x*y)*cos(x*(1-y))-0.5x*sin(x*y)*sin(x*(1-y))= 用matlab绘制y=sin(x)*cos(x) 为什么在matlab中输入syms x f=sym('x/(cos(x))^2') y(1)=diff(f) 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) 在matlab中绘出y=1/2[sin(x)+cos(x)]的图像 如何用matlab画y=267*sin(x)*sin(x)*cos(x);在（0 2pi）区间 MATLAB画图,y=sin(x)*(cos(x)-1)/((2*sin(x.^2)+4*cos(x)).^0.5)-( sin(x+y)sin(x-y)=k,求cos^2x-cos^2y matlab作sin(x)*cos(y)的三维图像 证明COS（X+Y）COS（X-Y）=COS^2X-SIN^2Y y=sin(x)和y=cos(x)的和matlab程序