How do I integrate the following:(adsbygoogle = window.adsbygoogle || []).push({});

[itex]\int_0^\infty r e^{-ar} \sin{(Kr)} dr[/itex]

i tried writing [itex] r e^{-ar} = -\frac{d}{da} e^{-ar}[/itex] and using integration by parts but i couldn't get anywhere. any ideas?

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# Homework Help: Integration by parts homework problem

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