Pre-Calc/Trig Unit 3: Analytic Trig and Applications/5.6 Half-Angle Identities Find the exact value by using a half-angle identity.cos 22.5° Find the exact value by using a half-angle identity.

cos 22.5°]]> 1.0000000 0.3333333 0 true true abc

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]]> Incorrect. Did you choose the Half-Angle identity for sin ?

]]> tan 23°

]]> Incorrect. Did you choose the Half-Angle identity for sin ?

]]> sin 23°

]]> Correct

]]> cos 23°

]]> Incorrect. Did you choose the Half-Angle identity for sin ?

]]>