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April 18, 2015

April 18, 2015

Posted by **Daniel** on Sunday, May 22, 2011 at 2:30pm.

- Trig -
**Reiny**, Sunday, May 22, 2011 at 4:31pm= cos(4x-3x)

= cos (x) by applying the cos(A-B) expansion

- Trig -
**Samantha**, Tuesday, February 12, 2013 at 5:47pmCos x

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