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**1. Homework Statement**

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. Homework 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.

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