Question

How do I plot the following on an argand diagram?
(pi * e ^ (i *theta))/(4* theta)
where pi/4 <= theta <= (9 * pi)/4

I know how to plot simple expressions in the form z = a + ib but this question has me stumped.

Answer 1

\[\pi e^{\frac{i\theta}{4\theta}}\]
like this?