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#1 2006-11-01 04:15:52

luca-deltodesco
Member
Registered: 2006-05-05
Posts: 1,470

integrating trig functions

is this valid?

(integration by parts)
(integration by parts)



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#2 2006-11-01 04:45:09

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

Re: integrating trig functions

The method of using integration by parts more than once and eventually getting the same integral, then rearranging and finding the value that way is perfectly valid. And in fact, extremely useful. Just one small thing -  the second line should be:

But the subsequent lines follow through as if that's what the second line was, so it was just a typo.


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