hey ppl, need help with this one: $\displaystyle \int \frac{\ln (x^2-4)}{\sqrt{x^2-4}}dx$. Tried parts, but it got too messy in the end. Any ideas?
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Have you tried trigonometric substitution?
yeah, by substituting $\displaystyle x=2\sec\theta$, i ended up with $\displaystyle 2\int \ln (2\tan\theta)\sec\theta d\theta$. Would there be another way to solve this question?
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