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## Homework Statement

Prove this identity

m) Sin^2 x / sin^2 x + cos x^2 = tan^2 x / 1 + tan^ x

## Homework Equations

http://i52.tinypic.com/105tdtk.jpg Letter (m) on the top

## The Attempt at a Solution

I dont know to much about trig identities, he barely taught anything. But apparently 1 is = to cos/cos and plenty of other things.

I tried to solve the right side, the first thing i did was turn the 1 into sin^ x + cos ^ x.

Then i turned the denominator into 1-sin^x - 1 + cos^x by subbing the values of cos^x , since cos^x = 1 - sin^2 .

I know that tan^x = sin^x / cos^x , but the things that I am subbing in keep cancelling eachother out, does anyone know how to solve this?