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September 2, 2014

September 2, 2014

Posted by **Anonymous** on Friday, April 22, 2011 at 6:39am.

- calculus -
**drwls**, Friday, April 22, 2011 at 7:07amlet 4x = u

dx = du/4

integral of tan 4x* dx =

(1/4) integral of tan u du

= (-1/4) log(cosu)

= (-1/4) log(cos4x)

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