- #1

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## Homework Statement

simplify cosx

^{4}-sinx

^{4}

## The Attempt at a Solution

I got cos2x

does anybody wanna solve this and let me know if I am right ?

- Thread starter synergix
- Start date

- #1

- 178

- 0

simplify cosx

I got cos2x

does anybody wanna solve this and let me know if I am right ?

- #2

- 31

- 0

Cos2x is correct.

- #3

tiny-tim

Science Advisor

Homework Helper

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Hi synergix!## Homework Statement

simplify cosx^{4}-sinx^{4}

## The Attempt at a Solution

I got cos2x

does anybody wanna solve this and let me know if I am right ?

It's

if you're not sure, then either you didn't go the quick way (factorise a

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