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 -75° Use Identities to find the exact value.

cos -75°]]> 1.0000000 0.3333333 0 true true abc -

]]> 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Incorrect ]]> 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 Incorrect ]]> 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 Correct -