Question: Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. (a) sin(4) 1 + cos(4) (b) 1 cos(40) sin(40)

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

Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. (a) sin(4) 1 + cos(4) (b) 1 cos(40) sin(40)

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