1. The problem statement, all variables and given/known data [moderator note: Image inserted to be visible in problem statement] 2. Relevant equations 3. The attempt at a solution My friend and I are trying to figure out how this works. This is the questions and the solution manual. We understand where the real power comes from but not at all how to get the complex. If anyone could give a brief explanation, that would be great. Preferably A because thats where we started and just cannot get the complex part at all.