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Zarby
 3 years ago
Integral using parts of t^(2) sin(t)
I got it to t^2cos(t) dt+2Integral tcos(t) dt
How and why do I have to use parts again to solve this?
Thanks
Zarby
 3 years ago
Integral using parts of t^(2) sin(t) I got it to t^2cos(t) dt+2Integral tcos(t) dt How and why do I have to use parts again to solve this? Thanks

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KingGeorge
 3 years ago
Best ResponseYou've already chosen the best response.1So you've gotten to the point \[\int t^2\sin(t) dt=t^2\cos(t)+2\int t\cos(t) dt\]To finish solving this, you need to integrate \[\int t\cos(t) dt\] using parts in the same way that you did the first integral.

KingGeorge
 3 years ago
Best ResponseYou've already chosen the best response.1You have to use parts to solve it, because it's the best way of solving it after guessing.

Zarby
 3 years ago
Best ResponseYou've already chosen the best response.0Why only integrate that side?

KingGeorge
 3 years ago
Best ResponseYou've already chosen the best response.1What exactly do you mean?
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