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Trigonometric Identity - Product to Sum 1/2

Last updated 14 August 2013, created 14 August 2013, viewed 183

Product to Sum Trigonometric Identity Involving (sin(a)*sin(b) and cos(a)*cos(b))

Video Tutorial: Writing a product of two sine functions and the product of two cosine functions as a sum or difference.

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mathispower4u"s avatarmathispower4u

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