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28 November, 02:01

Cos (2x) - 3cos (x) + 2 = 0?

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  1. 28 November, 02:06
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    Ignore above

    your equation is 2 (cosx) ^2-3cosx+1=0

    use quadratic formula to get results

    you will end up with

    cosx=1 or cosx=1/2

    so, x=0 or x=pi/3
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