Prove - 1-2-1- - cos ec-

1+^2α1+α=1+α+^2α1+α =α+^2α1+α #160; #160; #160; (as 1+^2α=^2α) =α(1+α)(1+α) =α ...

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Integration by Substitution

Prove : 1+2α...

Question

Prove :
$1 + \frac{{cot}^{2} α}{1 + csc α}$ = $cos e c α$

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