# How do I use my fx-100AU to convert between rectangular and polar co-ordinates?

To convert between rectangular and polar coordinates, first you enter the form you want for the output, then enter the two parameters of the input form (x & y or r & theta) . The outputs are stored in memory E and memory F, and can be recalled as required.

For example, to convert (2,5) to polar coordinates

Press e2,5)p

The outputs values are stored as follows 'r' is stored in memory E and theta is stored in memory F.

E can be recalled by pressing Qkp and F can be recalled by pressing Qlp.

To convert r=3 and theta=60 degrees to rectangular coordinates

Press qe3,60)p

The outputs values are stored as follows 'x' is stored in memory E and 'y' is stored in memory F.

E can be recalled by pressing Qkp and F can be recalled by pressing Qlp.