- #1

color_me

- 4

- 0

## Homework Statement

Simplify 1/(cos^4x+sin^4x)

## Homework Equations

One can't apply cosine of a difference when the cosine is raised to a power, right?

## The Attempt at a Solution

I tried using several trig identities, but it doesn't get any simpler.

Thank you for any help in advance!