I am using Wolfram Mathematica 11. Given these quantities:

    v = 3; 
    Y = Sqrt[v^2 - X^2];

    Ja = BesselJ[0, X]; 
    Jap = -BesselJ[1, X];

    Ka = BesselK[0, Y]; 
    Kap = -BesselK[1, Y];

    side1 = Jap / (X*Ja); 
    side2 = -Kap / (Y*Ka);

I would like to obtain the same as:

    Plot[{side1, side2}, {X, 0, 10}]

but on a `.txt` file, simply containing a table of values in this notation:

     0.0000000000e+00 -inf -inf
     3.0060120240e-02 -2.3042094212e+00 -2.1217639107e+01
     6.0120240481e-02 -1.8613440179e+00 -1.0654661322e+01

First column should list the `X` values; second column should list the corresponding `side1` values; third column the corresponding `side2` values.

How is it possible, with and without adaptive sampling?


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This is my naive attempt to adapt code from [this answer][1], at least for the plot of the first function `side1`:

    data = Cases[Plot[side1@X, {X, 0, 10}], Line[data_] :> data, -4, 
        1][[1]];
    Export["file.txt", data, "Table"]

but it generates an error:

    Part: Part 1 of {} does not exist

  [1]: https://mathematica.stackexchange.com/a/19860