How do I integrate

$\displaystyle \int e^{-st}t\cos{t}dt$

I've tried integration by parts (turned out long, messy, and nothing like the answer in the back of the book) and I don't think I can use derivatives of a transform yet.

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- Nov 29th 2009, 12:21 PMSemlohLaplace transform integral problem
How do I integrate

$\displaystyle \int e^{-st}t\cos{t}dt$

I've tried integration by parts (turned out long, messy, and nothing like the answer in the back of the book) and I don't think I can use derivatives of a transform yet.