Education Technology

Solution 34507: Performing Polar and Rectangular Conversions Using a TI-84 Plus C Silver Edition Graphing Calculator.

How do I perform polar and rectangular conversions using a TI-84 Plus C Silver Edition graphing calculator?

The examples below demonstrate how to perform polar to rectangular and rectangular to polar coordinate conversions using a TI-84 Plus C Silver Edition graphing calculator. Converting coordinates requires two separate operations, one for each point in an ordered pair.

For Example: Convert polar coordinates (1, p) to rectangular coordinates using P►Rx( and P►Ry(

1) Press [MODE].
2) Press [▼] [▼] [▼].
3) Press [ENTER] [2ND] [QUIT].

4) Press [2ND] [ANGLE] [7].
5) Press [1] [ , ] [2ND] [] [ ) ].
6) Press [ENTER] to display the answer -1.
7) Press [2ND] [ANGLE] [8].
8) Press [1] [ , ] [2ND] [] [ ) ].
9) Press [ENTER] to display the answer 0.
10) The polar coordinates (1,) when converted to rectangular coordinates equal (-1,0).

Convert the previous calculated rectangular coordinates to polar coordinates using R►Pr( and R►Pq(.

1) Press [2ND] [ANGLE] [5].
2) Press [(-)] [1] [ , ] [0] [)].
3) Press [ENTER] to return the answer 1.
4) Press [2ND] [ANGLE] [6].
5) Press [(-)] [1] [ , ] [0] [)].
6) Press [ENTER] to get the result 3.141592654.

Please see the TI-84 Plus C Silver Edition guidebook for additional information.