1. The problem statement, all variables and given/known data I'm trying to show that a given matrix is the inverse of the other, by showing that multiplying them together generates the identity matrix. I can't see a way to simplify the last step and I feel like I'm missing something..? Any input on this would be helpful. Thanks! 2. Relevant equations see below j = sqrt(-1) 3. The attempt at a solution How do I prove that the rest of the terms are 0?