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22 July, 13:42

2 sin squared x = 4 sinx+6

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  1. 22 July, 14:13
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    x = 3π/2 + 2πk

    Step-by-step explanation:

    2 sin² x = 4 sin x + 6

    2 sin² x - 4 sin x - 6 = 0

    sin² x - 2 sin x - 3 = 0

    (sin x - 3) (sin x + 1) = 0

    sin x - 3 = 0

    sin x = 3

    no solution

    sin x + 1 = 0

    sin x = - 1

    x = 3π/2 + 2πk
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