Question 1162598
How to prove.

cos 2x +1/sin 2x = sin 2x/1- cos 2x
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If you mean:

{{{(cos(2x) +1)/sin(2x) = sin(2x)/(1- cos(2x))}}}
Cross multiply
{{{1 - cos^2(2x) = sin^2(2x)}}}
{{{1 = sin^2(2x) + cos^2(2x)}}}
Pythagorean identity