Pre-Calc/Trig Unit 3: Analytic Trig and Applications/5.3 and 5.4 Sum//Difference Identities Use Identities to find the exact value.cos 165° Use Identities to find the exact value.

cos 165°]]> 1.0000000 0.3333333 0 true true abc ]]> 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Incorrect ]]> 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 Incorrect ]]> 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 Incorrect ]]> 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Correct