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13 December, 21:37

Sin x - sin (2x) = 0

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  1. 13 December, 21:56
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    Sin x = sin 2x

    x=2kπ+2x

    x=-2kπ

    also

    x=2kπ+π-2x

    3x=2kπ+π

    x=2kπ/3+π/3
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