matalab三角函数矩阵运算

Question

A=[cos(x)*cos(y) cos(x)*cos(y) -sin(x)
-sin(y) cos(y) 0
sin(x)*sin(y) sin(x)*sin(y) cos(x) ]
B=[m 0 0
0 n 0
0 0 s] 如何用MATLAB计算矩阵A*b啊，谢谢
不可以呢总出错
A=[cos(x)*cos(y) cos(x)*cos(y) -sin(x)
-sin(y) cos(y) 0
sin(x)*sin(y) sin(x)*sin(y) cos(x) ]
B=[m 0 0
0 n 0
0 0 s]
C=A*B
??? Error using ==> mtimes
Inner matrix dimensions must agree.出现这样的错误出现这样的错误

Answer 1

A=[cos(x)*cos(y) cos(x)*cos(y) -sin(x)
-sin(y) cos(y) 0
sin(x)*sin(y) sin(x)*sin(y) cos(x) ]
B=[m 0 0
0 n 0
0 0 s]
C=A*B

C=
直接输入就行啦，有问题吗？