1. The problem statement, all variables and given/known data Questions on it's own are relatively simple, however, there is a bonus question which asks ''with a right choice of Theta, show how you can do question 36 easily with question 38'' 2. Relevant equations 3. The attempt at a solution Attempting question 36, it is known that B^8 is the identity matrix, so B^2001 is I*B. Question 38 is just using some product to sum formulas etc, but I'm stuck as to how I apply question 38 to solve 36? my initial guess is Theta=pi or pi/2? Any hints, tips would be much appreciated.