- #1

JPBenowitz

- 144

- 2

## Homework Statement

So we are given [itex]\alpha[/itex]exp(i[itex]\varpi[/itex]t) +[itex]\alpha[/itex]*exp(-i[itex]\varpi[/itex]t) and are asked to prove the resulting equation is real.

## Homework Equations

[itex]\alpha[/itex] + [itex]\alpha[/itex]* = 2Re([itex]\alpha[/itex]) and Euler's Identity

## The Attempt at a Solution

I tried expanding out the exp's to cosines and isines but couldn't reach the solution.