On Mar 11, 10:47 am, Mani chandra <[email protected]> wrote:
> Also I tried some basic stuff with "I" and it doesn't seem to be working.
>
> sage: exp(I).real
> <bound method SymbolicComposition.real of e^I>

Sage prefers methods to properties:

sage: exp(I).real()
cos(1)

Using

z = exp(I*r*cos(theta)).real()

makes your parametric_plot3d work, too.

Carl

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