SOLUTION: Use the sum and difference identities to find the exact value of {{{cos(345)}}}

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Question 880428: Use the sum and difference identities to find the exact value of cos%28345%29
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
cos(315 + 30) = cos 315 cos 30 - sin 315 sin 30
= √6/4 + √2/4
(cosx, sinx) summary for Reference
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