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October 25, 2014

October 25, 2014

Posted by **Jamie** on Wednesday, December 23, 2009 at 1:18am.

- Pre Cal -
**Bun**, Wednesday, December 23, 2009 at 1:29amcos^2 + sin^2 =1

cos^2 = 1-16/25 =9/25

sin theta terminates in quadrant II, so sin>0 but cos <0

therefore cos =-3/5

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