integrate question:

any help, im thinking it has to do with identities?

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- October 23rd 2008, 10:58 PMjvignaciointegration using trigonmetric functions
integrate question:

any help, im thinking it has to do with identities? - October 23rd 2008, 11:08 PMDJMinkus
It looks kind of evil, but it's actually not that difficult. You can split it up into two different integrals.

Now use u-subs, taking the 4x+5 and the 7-8x to be the u's for the two different integrals. I think it yields:

- October 23rd 2008, 11:48 PMjvignacio
- October 26th 2008, 04:12 PMDJMinkus
But don't forget, the coefficient for x in the sin function is -8, making du = -8 and thus causing the two minuses (from the original equation and then from the integration) to cancel out, yielding a positive.