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

tanx/2 = (1-cosx)/sinx

2. Relevant equations

3. The attempt at a solution

This is where i got on the right side

i dont know where to finish...(1-cosx)/sinx

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# Proving tanx/2 = cscx - cotx

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