10-1 - 101.notebook November19,2010 101Formulasforcos( )...

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10­1.notebook 1 November 19, 2010 Apr 3­8:22 AM 10­1 Formulas for cos ( α ± β) and sin ( α ± β) cos ( α + β) = cosαcosβ - sinαsinβ cos ( α - β) = cosαcosβ + sinαsinβ sin ( α + β) = sinαcosβ - cosαsinβ sin ( α - β) = sinαcosβ - cosαsinβ Apr 3­8:31 AM Ex. 1 Find exact value of sin 15 0
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10­1.notebook 2 November 19, 2010 Apr 3­8:32 AM Ex. 2 Find exact value of a. cos 50 0 cos 10
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This note was uploaded on 04/22/2011 for the course MATH 212 taught by Professor Owens during the Winter '07 term at Grand Valley State.

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10-1 - 101.notebook November19,2010 101Formulasforcos( )...

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