For example, I have this equation
A*cos( w0*t+phi) * B*sin(n*w0*t+phi+psi)
where A,B,w0,psi are all constants, and n is a positive non zero integer.
I want to integrate with repsect to psi, from 0 to 2*pi, and I already know the answer is zero.
How do I make the symbolic toolbox understand the problem in a way it can come to that result?