Can someone plz show me the concept of trig substituion and easy way to use it...I don't quite understand this...(adsbygoogle = window.adsbygoogle || []).push({});

I'm ot sure how to dothis problem below..

1) indefinite integral dx/(x^3sqrt(x^2-a^2))

2) indefinite integral (1-4x^2)^(3/2)dx

How to use integration by part for

indefinite integral of x*inverse tan(x) dx.

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# Trig subtitution

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