Plotting a function with wolfram mathematica

**asi123** · March 10th 2010, 09:24 AM

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.

**shawsend** · March 11th 2010, 04:58 AM

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.