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22 June, 16:59

Solve for all radian solutions and x if 0 sin x + 2sin x cos x=0

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  1. 22 June, 17:46
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    the answer is

    sin x + 2sin x cos x=0

    sin x (1 + 2 cos x) = 0, so sin x = 0 or (1 + 2 cos x) = 0, implies cos x = - 1/2

    the solutions are x = arc sin 0 = 2Pi + 2kpi or x=arccos (-1/2) = 2Pi/3 + 2kpi
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