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$\begingroup$

$\ I_n = \int \cos^n \theta d\theta$

Find a recursive equation to express $\ I_n $ in terms of $\ I_n-_2 $. Find $\ I_6 $ and $\ I_7 $ as well.

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    http://en.wikipedia.org/wiki/Integration_by_reduction_formulae#Examples2012-11-23

2 Answers 2