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Using the Quotient, Reciprocal, and Pythagorean Identities
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http://youtu.be/OmJ5fxyXrfg Rate video Rate this resource
http://youtu.be/4BR_qUZ5jK0 Rate video Rate this resource

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Additional Resources (if any)

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The Unit Circle: Cosine and Sine (Section 10.2) http://ostts.org/Stitz_Zeager_Precalculus_Book_By_Section_files/10-2.pdf Rate PDF Rate this resource