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Graphing equation in Mathematica help

  1. Aug 2, 2009 #1
    Hi, I am trying to graph


    in mathematica, and i used

    Plot[x + (1/(sqrt (1 + cos (x)^2))), {x, 0, 9}]

    but I am not getting an output graph.

    Any ideas?!

    Plot[x + 1/Sqrt[1 + Cos x^2], {x, 0, 9}, PlotRange -> {-10, 10}]

    I found few errors, and above is what I got, it's a progress, but now I get this error:

    Plot::exclul: {Im[Cos x^2]-0} must be a list of equalities or \
    real-valued functions.
    Last edited: Aug 2, 2009
  2. jcsd
  3. Aug 3, 2009 #2


    Staff: Mentor

    Plot[x + 1/Sqrt[1 + Cos[x]^2 ], {x, 0, 9}]

    Function arguments always use square brackets as in f[x]
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