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

will sum1 prove this ........@=theta

1-cos@ / sin@ = tan(@/2)

2. Relevant equations

3. The attempt at a solution

i tried to do this

cos@ = cos^2(@/2) - sin^2 (@/2)

wat now?

...

thats doesnt get me anywhere

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# Homework Help: Trigonometry help ! !

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