How to solve ∫ytan^-1(y) dy using integration by parts?

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SUMMARY

The integral ∫ytan^-1(y) dy is solved using integration by parts. The recommended approach involves setting u = arctan(y) and dv = y dy. This method effectively simplifies the integral, allowing for straightforward evaluation. The discussion emphasizes the importance of recognizing the appropriate technique for integration rather than attempting trigonometric substitution.

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anna062003
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Evalutate ∫ytan^-1(y) dy

i don't know how to start, can somebody tell me how?
 
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anna062003 said:
Evalutate ∫ytan^-1(y) dy

i don't know how to start, can somebody tell me how?

It's not a trig substitution problem, it's an integration by parts problem. Try u=arctan(y) and dv=ydy.
 

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