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TI-83 Plus Window Editor in Polar Mode

You must set several variables in the Window editor of the TI-83 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:

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  • This setting contains the first value of the independent variable

    image1.png

    that the calculator will use to evaluate all polar equations in the Y= editor. It can be set equal to any real number.

    image2.jpg image3.png
  • This setting contains the largest value of the independent variable

    image4.png

    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.

    image5.png

    is usually set equal to

    image6.png

    However, there are occasions when you may want to set it equal to a larger number.

    image7.png

    is entered into the calculator by pressing [2nd][^].

    image8.jpg image9.png
  • This setting tells the calculator how to increment the independent variable

    image10.png
  • as it evaluates the polar equations in the Y= editor and graphs the corresponding points.

    image11.png

    must be a positive real number.

    You want

    image12.png

    to be a small number like

    image13.png

    but you don’t want it to be too small like 0.001. If

    image14.png

    is too small, it will take a few minutes for the calculator to produce the graph. And if

    image15.png

    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

    image16.png

    press [ON] to terminate the graphing process. You can then go back to the Window editor and adjust the

    image16.png

    setting.

The remaining items in the Window editor deal with setting a viewing window for the graph.

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