Prove that : Cos 2A =cot^2-1/cot^2+1

Adrien Brunelat asked Nov 11, 2022

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Adrien Brunelat asked Nov 11, 2022

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11 votes

Explanation:

steps are in the picture.

Note:if you need to ask question about it i am ready to give you answer.

Nick Ruiz answered Nov 17, 2022

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