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31 January, 00:29

Find all solutions of the equation. 5 sin x - 8 = 3 sin x - 7

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  1. 31 January, 00:47
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    Hello:

    5 sin x - 8 = 3 sin x - 7

    5 sin x - 3 sin x = 8 - 7

    2sinx = 1

    sinx = 1/2

    but : sin (π / 6) = 1/2

    so : sinx = sin (π/6)

    ll solutions : x = π/6 + 2kπ or x = π - π/6 + 2kπ ... k in : Z
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