The question is to evaluate the integral in the attachment.(adsbygoogle = window.adsbygoogle || []).push({});

Using trig substition, I've reduced it to ∫ (tanz)^2 where z will be found using the triangle. I just need to integrate tangent squared which I can't seem to figure how to do. I tried using the trig identity (secx)^2 - 1 but I don't know what to do after.

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# Homework Help: Trig integral

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