(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

∫tan^2(2x)/sec2x dx; u=sec2x; du=1/2tan^2(2x)dx.

2. Relevant equations

∫1/x(dx)-ln|x|+C.

∫1/u(du)=ln|u|+C

3. The attempt at a solution

This is me trying to rewrite the equation. (sin^2(2x)/cos^2(2x))/(1/cos2x), (sin^2(2x))/(cos(2x)).

Honestly, I feel lost trying to find a differential on the denominator, to change into the numerator.

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# Homework Help: Calculus, Integrals with Natural Logarithms

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