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HSF.TF.C.9 Tutor Intake — Angle Addition and Double Angle Formulas

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Grade 9·14 problems·~18 min·Common Core Math - HS Functions·group·hsf-tf-c-9
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Procedures

1.

Given sin⁡A=35\sin A = \dfrac{3}{5} with angle AA in Quadrant I, find cos⁡(2A)\cos(2A).

Enter your answer as a fraction (e.g., 7/25).