1. The problem statement, all variables and given/known data I have a vector A and B in spherical coordinates, and I need to find: part a) The vector component of B in the direction of A. part b) The vector component of B perpendicular to A 2. Relevant equations dot product cross product 3. The attempt at a solution Alright at my first look I saw vector component and I thought of the cross product which yields a vector result, but then I realized that it in no way tells us anything about B in the direction of A. So then dot product came to mind but that yeilds a scaler result. So I am kind of stumped as to where to start. My only idea for part a was to take (A dot B)/vector A which would yield a vector result. and I had no idea what to do for part b.