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# Integration by parts watch

1. (Original post by Farhan.Hanif93)
What makes you think he is doing C3 and C4? If you even took a moment to open his sig, you'll see that he's doing an OU course in maths AND if you read the thread, you'd see that he has come across complex numbers/De Moivre's theorem before so it's safe to assume that he'd be allowed to use it. He would only not get the marks if the question states specific use of IBP.

what he said
2. (Original post by Plato's Trousers)
yes, thanks. I have it now. I have two methods, in fact, for this integral. Either the IBP method (now that I recognise that the second step creates something involving the original integral, meaning we can just rearrange and solve - nice!). And secondly Farhan's rather elegant use of de Moivre's formula - (extra nice!).

God, I heart maths!!

Thanks for asking, by the way. Appreciate it.

And thanks for this comment the OP is the kind of person that Plato has always seemed to me - that is, the sort who actually want to understand and not just get the answer. - that is very true of me. I am past the "just passing exams" stage these days. I genuinely want to understand, and the people on this forum are so great at explaining stuff
What can I say, maths love rewards maths love.
3. (Original post by Farhan.Hanif93)
What makes you think he is doing C3 and C4? If you even took a moment to open his sig, you'll see that he's doing an OU course in maths AND if you read the thread, you'd see that he has come across complex numbers/De Moivre's theorem before so it's safe to assume that he'd be allowed to use it. He would only not get the marks if the question states specific use of IBP.
Ouch, FHN is in the mood. Did someone remind you of your cambridge rejection or something because you seem angry. LOL!
4. LOL! Okay, I apologise then. But seriously if he is doing undergrad maths why is he asking for the answer to a Q like this?! Surely it should be a piece of piss!
5. (Original post by Aristotle's' Disciple)
LOL! Okay, I apologise then. But seriously if he is doing undergrad maths why is he asking for the answer to a Q like this?! Surely it should be a piece of piss!
As I understand it, he's doing an OU course. Which means you often have to do a lot of catching up in your own time, and/or people doing it may be seriously out of practice.

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Updated: March 18, 2011
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