Posted by **Anonymous** on Monday, May 3, 2010 at 10:10am.

How do you solve for these identities:

1-sin^2è/cosè= cosè

sin^4è-cos^4è=2sin^2è-1

## Answer this Question

## Related Questions

- Precal - I do not understand how to do this problem ((sin^3 A + cos^3 A)/(sin A...
- TRIG! - Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...
- tigonometry - expres the following as sums and differences of sines or cosines ...
- Precalculus - Verify the identities. Cos^2x - sin^2x = 2cos^2x - 1 When ...
- Trig Identities - Proving identities: 1) 1+ 1/tan^2x = 1/sin^2x 2) 2sin^2 x-1 = ...
- trigonometry (please double check this) - Solve the following trig equations. ...
- Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...
- Trig! - The identities cos(a-b)=cos(a)cos(b)sin(a)sin(b) and sin(a-b)=sin(a)cos(...
- Trig - Are any of these three problems identities? 1. Cos^2x-sin^2x=1-2sin^2x 2...
- Trig - Are any of these three problems identities? 1. Cos^2x-sin^2x=1-2sin^2x 2...

More Related Questions