I need to know in steps how to prove this identity, if anyone minds helping. Thanks!

http://img4.imageshack.us/img4/3883/codecogseqn2.gif

Printable View

- Nov 28th 2010, 08:25 PMDiesalAnother Trig Identity problem.
I need to know in steps how to prove this identity, if anyone minds helping. Thanks!

http://img4.imageshack.us/img4/3883/codecogseqn2.gif - Nov 28th 2010, 08:30 PMharish21

- Nov 28th 2010, 08:41 PMDiesal
- Nov 28th 2010, 08:45 PMharish21
Are you even attempting?

You should be able to recognize that the cos(x) in the numerator and the denominator cancel each other out. So you are left with

You have been told in your previous post that . based on that, - Nov 28th 2010, 08:53 PMDiesal
I didn't realize they canceled each other out, but when I did the equation myself I canceled them out anyway. When I was left with http://latex.codecogs.com/gif.latex?...space;1-cos^2x I just added the negative to the other side to make a positive, thus making it all equal one. I thought I was doing it wrong though, since I didn't know they canceled. Thanks for clarification.