Question: Q.4 Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. (a) 2 sin(199) cos(190) (b) 2 sin(40) cos(48)

Q.4
Q.4 Simplify the expression by using a Double-Angle Formula or a Half-Angle

Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. (a) 2 sin(199) cos(190) (b) 2 sin(40) cos(48)

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