Hi all, consider the integral(adsbygoogle = window.adsbygoogle || []).push({});

[tex]I= \int \frac{dx}{cos^2 x( \sqrt{ cos^2 x - cos^2 a} ) } [/tex]

I've solved it with three substitutions (don't have time to post it at the moment) but was wondering if anyone here can provide a superior, more simplistic solution; e.g. one substitution with proper algebraic simplification.

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# Homework Help: Alternate, superior solution to an integral

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