why does the prof wrote a mistake there and wrote 2cos theta in there ?? (i didnt typed the question correctly,the original is i need to calculate the integral on the volume enclosed by z>=0 and the sphere wich is written in the photo.) how mathematicky can i get this transition how to get this expression from cartesian to polar and get the 2 cos teta on the interval [TEX]\rho\le 2\cos \phi[/TEX] ??