Posted by **Adam** on Tuesday, March 2, 2010 at 11:37pm.

prove

cos squared B- sin squared B= 2cos squared B -1

## Answer this Question

## Related Questions

- Precalculus with Trigonometry - Prove or disprove the following Identities: cos...
- math - prove the identity : cos^4 theta- sin ^4 thetaover sin squared theta cos ...
- math - i am having a minor difficulty i've been stuck for over an hour and don't...
- Math - Find the shortcut. Solve these problems. Then find and explain a shortcut...
- algebra 2 multiple choice HELP - find f(a), if f(t) = 2t2(squared)-t-2 A. 2(a+t)...
- Precalculus - Prove or disprove cos(x+y)cos(x-y)=cos squared (x) - Sin squared (...
- math - How do i find the area of a triangle? For example: A squared + b squared...
- Pre Calc - How to prove tan4x = 1-8 sin squared of cos squared of x
- College Algebra - Can someone check my answer please! I'm not sure this is right...
- Math11U - A Pythagorean Triple is a set of integers that satisfy the Pythagorean...