Question: Simplify the expression by using a Double-Angle Formula or a Half-Angle (a) cos - - sin 2 2 (b) 2 sin COS 2 Need

Simplify the expression by using a Double-Angle Formula or a Half-Angle (a)

Simplify the expression by using a Double-Angle Formula or a Half-Angle (a) cos - - sin 2 2 (b) 2 sin COS 2 Need Help? 12

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