I need help with this one:(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\frac{1}{\cos(x)-1}dx[/tex]

I know there must be a way to rewrite it so that i can use 1 - cos^2 = sin^2. I've tried to multiply by cosx + 1 / cosx + 1 and that gets me further but the answer doesn't seem to be the same maybe because of simplification?

Any hints?

thanks

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# Integral help

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