Prove idenity: 1 + sin theta / cos theta = cos theta / 1 - sin theta

I cant figure out which idenity!?

Show steps if at all possible thanks in advance.

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- December 5th 2008, 12:00 PMGarfaceProving the identity
**Prove idenity: 1 + sin theta / cos theta = cos theta / 1 - sin theta**

**I cant figure out which idenity!?**

Show steps if at all possible thanks in advance. - December 5th 2008, 12:04 PMrunning-gag
Hi

Start with

- December 5th 2008, 01:21 PMGarface?
Still a bit confused, The more i think about it, Maybe I just dont understand the goal of proving an idenity, I thought it was to get the problem into the form of one of the basic idenitys such as tan = sin/cos.

- December 5th 2008, 02:44 PMSoroban
Hello, Garface!

You're expected to know this identity:

. .

Quote:

Prove the idenity: .

Multiply the right side by

. .