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Math Help - Need Help

  1. #1
    Newbie
    Joined
    Jul 2009
    Posts
    20

    Need Help

    Okay, so if f(x) = cos2x and g(x) = x^2 - 3.



    What would these be?

    a) f(g(x))
    b) g(f(x))
    c) f(f(x))
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  2. #2
    Junior Member enjam's Avatar
    Joined
    Jul 2009
    Posts
    26
    a) f(g(x)) = cos(2(x^2 - 3))
    b) g(f(x)) = cos^2(2x) - 3
    Not 100% sure on this one but, I think it'd be
    cos2(cos(2x))
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