# Uniqueness/ Non-uniquenss of Cartesian & Polar Coordinates

1. May 1, 2005

### Apophis

What is the difference in the "uniqueness" of the representations of Cartesian coordinates and in polar coordinates? Also, what is the non-uniqueness?

2. May 1, 2005

### James R

Take an example:

The point with unique cartesian coordinates (1,0) has many possible polar coordinates, such as $(1,0), (1, 2\pi), (1,4\pi)$.

Non-uniqueness is having multiple expressions for the same point.