Convert from Rectangular to Polar Coordinates on the TI-83 Plus

You’re used to seeing points in the xy-plane displayed in the (x, y) rectangular form. But when dealing with polar equations, you view these points in their polar form. To convert (x, y) from rectangular to polar form on the TI-83 Plus graphing calculator:

  1. Press [2nd][APPS] to access the Angle menu. (On the TI-83, press [2nd]MATRX].)

  2. Press [5] to select the

    image0.png

    option.

  3. Enter the point (x, y) and press [ENTER] to display r in the

    image1.png

    polar form of the point.

    To do so, enter the x-coordinate, press [.], enter the y-coordinate, press [ ) ], and then press [ENTER]. The value of r appears on the right of the screen.

  4. Press [2nd][APPS][6] to select the

    image2.png

    option from the Angle menu. (On the TI-83, press [2nd][MATRX][6].)

  5. Enter the point (x, y) and press [ENTER] to display

    image3.png

    in the

    image4.png

    polar form of the point.

    image5.png

    will be in degrees if the calculator is in Degree mode, or it will be measured in radians if the calculator is in Radian mode.

    Converting from rectangular to polar coordinates.
    Converting from rectangular to polar coordinates.
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