1. The problem statement, all variables and given/known data Express the solution P(t, x1) = cos(!t − kx1) as the superposition of two complex exponentials. Show that each complex exponential is also a solution of the 1-D wave equation. 2. Relevant equations just that THETA=P !=w whoops, made a type 3. The attempt at a solution im not really sure how to tackle this, i do know that a solution to the wave equation added to another solution is also a solution.