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Math Help - Plotting a function with wolfram mathematica

  1. #1
    Member
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    May 2008
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    171

    Plotting a function with wolfram mathematica

    Hey guys.

    I'm kind of new to this program.
    In 1.jpg there is the question and in 2.jpg I showed what I tried to do.
    The problem is that nothing is being shown on the plot, any Idea what I'm supposed to do?

    Here is y[x]:
    y[x] = (55 (40 + \[ImaginaryI] 20 + \[ImaginaryI] 55 Tan[180 x/2]) -
    75 (55 + \[ImaginaryI] (40 + \[ImaginaryI] 20) Tan[
    180 x/2]))/(55 (40 + \[ImaginaryI] 20 + \[ImaginaryI] 55 Tan[
    180 x/2]) +
    75 (55 + \[ImaginaryI] (40 + \[ImaginaryI] 20) Tan[180 x/2]))

    Thanks a lot.
    Attached Thumbnails Attached Thumbnails Plotting a function with wolfram mathematica-1.jpg   Plotting a function with wolfram mathematica-2.jpg  
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  2. #2
    Super Member
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    Aug 2008
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    By default, Mathematica does not plot a quantity if it's complex or say why it's not plotting. Just do a Re[myfunction[x]] or Im[myfunction[x]] to see the real or imaginary part.
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  3. #3
    Member
    Joined
    May 2008
    Posts
    171
    10x.
    You may know what is the problem with this one?
    Attached Thumbnails Attached Thumbnails Plotting a function with wolfram mathematica-1.jpg  
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