(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

(1-cos^2x)(1+tan^2x) = tan^2x

2. Relevant equations

N/A

3. The attempt at a solution

(1-cos^2x)(1+tan^2x) = tan^2x

L.S.

= (sin^2x)(1+sin^2x/cos^2x)

= sin^2x+(sin^4x/cos^2x)

Now, I get a common denominator, but it's not doing anything for me. Did I do the right thing in converting the tan?

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# Homework Help: Trig Identity 3

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