TI83 Plus Window Editor in Polar Mode
You must set several variables in the Window editor of the TI83 Plus graphing calculator when the calculator is in Polar mode. The following gives an explanation of the variables that you must set in this editor:

This setting contains the first value of the independent variable
that the calculator will use to evaluate all polar equations in the Y= editor. It can be set equal to any real number.

This setting contains the largest value of the independent variable
that you want the calculator to use to evaluate all polar equations in the Y= editor. It can be set equal to any real number.
is usually set equal to
However, there are occasions when you may want to set it equal to a larger number.
is entered into the calculator by pressing [2nd][^].

This setting tells the calculator how to increment the independent variable

as it evaluates the polar equations in the Y= editor and graphs the corresponding points.
must be a positive real number.
You want
to be a small number like
but you don’t want it to be too small like 0.001. If
is too small, it will take a few minutes for the calculator to produce the graph. And if
is a large number like 1, the calculator may not graph enough points to show you the true shape of the curve.
If it’s taking a long time for the calculator to graph your polar equations, and you start to regret that very small number you placed in
press [ON] to terminate the graphing process. You can then go back to the Window editor and adjust the
setting.
The remaining items in the Window editor deal with setting a viewing window for the graph.