Error when trying to enter in a simple matrix

Hello,

I am simply trying to enter in a 3x3 matrix into matlab and it is giving me an error code, I have done this many time before and have no idea why its giving me an error this time around.

Thanks

Answer 1

[Fangjun Jiang]

most likely need to be written as

(cos(psi))^2

Answer 2

[Jeremy]

The little red underlines are not just there for decoration - sin^2(x) is not valid syntax in matlab. I think you want

sin(psi)^2