(1 - cos)/(1 + cos) = (csc - cot) ^2

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Prove the trig function (1 - cos)/(1 + cos) = (csc - cot) ^2 make the left look like the right.
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One question to disliked u disliked this video...before dislike pls solve this sum without any references okkk....

kalavathikotthapalli
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prove that cos A + sin A + 1 / cos A - sin A - 1 = cosec A / cot A

robinsinghparmar