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

I'm attempting to prove that

1 - sin^2 t /(1 + cos t) - cos^2/(1+tan t) = cos t sin t

2. The attempt at a solution

I've tried various approaches. The most promising has the LHS reduced to:

(sin t cos t (1 + cos t + sin t cos t))/((1 + cos t)(cos t + sin t)).

I've also shown numerically that the LHS resembles the RHS so I don't think there was a typo in the original problem.

Thanks!

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Trigonometric Identity

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