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December 22, 2014

December 22, 2014

Posted by **mohamed sedeeq** on Wednesday, February 15, 2012 at 7:45pm.

- trig -
**bobpursley**, Wednesday, February 15, 2012 at 8:16pmI wonder if you have learned the power reduction formulas...

Power-reduction formulas see http://en.wikipedia.org/wiki/List_of_trigonometric_identities

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