Tutoring math, you encounter the differences between calculators even from the same manufacturer. Now, the tutor shows how to convert from rectangular to polar coordinates using the Casio fx-991ES PLUS C.

In my post from May 18 I show how to convert from rectangular to polar coordinates using the Casio fx-260solar. Here’s how to do the same with the Casio fx-991ES PLUS C:

Example: Convert (-80,-56) to polar coordinates using the Casio fx-991ES PLUS C.

Solution:

Key in SHIFT + -80 SHIFT ) -56 ) =

Across the bottom, the length (r) will show first; arrow over to see θ.

HTH:)

Source:

Casio fx-991ES PLUS C User’s Guide.

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.