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Math Help - Trig - Factoring

  1. #1
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    Trig - Factoring

    I've been working on a problem and Im stuck here:

    2(cos(x))^2 + sin(x) - 1 = 0

    I just can't figure out how to factor this any further, any help would be appreciated
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  2. #2
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    Quote Originally Posted by maryanna91 View Post
    I've been working on a problem and Im stuck here:

    2(cos(x))^2 + sin(x) - 1 = 0

    I just can't figure out how to factor this any further, any help would be appreciated
    2(1 - \sin^2{x}) + \sin{x} - 1 = 0

    2 - 2\sin^2{x} + \sin{x} - 1 = 0

    1 + \sin{x} - 2\sin^2{x} = 0

    factor and finish ...
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    Thanks a lot!
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