- #1

accountkiller

- 121

- 0

## Homework Statement

Verify that y1 = (e^x) * (cos x) solves the linear, homogeneous, 2nd order differential equation y'' - 2y' + 2y = 0

## Homework Equations

## The Attempt at a Solution

So I used the product rule but just kept going in circles with the cos x. I remember there's a way to do this so you don't go in circles, but I forgot! I'd appreciate any help.