## (+) Prove the addition and subtraction formulas for sine, cosine, and tangent and use them to solve problems.

CC.9-12.F.TF.9 (+) Prove and apply trigonometric identities. Prove the addition and subtraction formulas for sine, cosine, and tangent and use them to solve problems.Are you ready for some Common Core Math quizzes in section 9-12.F.TF.9? Download our app to get started

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