How does calculator calculate polar coordinate addition?

1. First, make sure that you have these two keys on your computer. The functions of these two keys "Pol" and "Rec" are Pol respectively.

2. Secondly, the rectangular coordinate system is transformed into the polar coordinate system rec.

3. Final polar coordinates &; Rectangular coordinate POL( SHIFT++): Convert rectangular coordinate into polar coordinate: POL (SHIFT++), input X coordinate, (SHIFT++), and input Y coordinate.