Cartesian Co-ordinates and Polar Co-ordinates

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Discussion Overview

The discussion revolves around the differences between Cartesian coordinates and polar coordinates, including their dimensionality and mathematical relationships. It also touches on related concepts in three-dimensional space.

Discussion Character

  • Conceptual clarification

Main Points Raised

  • One participant defines Cartesian coordinates as "x,y,z" and polar coordinates as involving degrees and a circular shape.
  • Another participant points out that Cartesian coordinates can be three-dimensional while polar coordinates are specifically two-dimensional, providing mathematical relationships between the two systems.
  • The mathematical relationships include that in two dimensions, the Cartesian point (x,y) corresponds to (r,θ) in polar coordinates, where r is the distance from the origin and θ is the angle with the positive x-axis.
  • In three dimensions, the discussion introduces the concepts of cylindrical and spherical coordinates as analogs to polar coordinates.

Areas of Agreement / Disagreement

Participants generally agree on the basic definitions and relationships between Cartesian and polar coordinates, though there is a clarification about dimensionality. No significant disagreement is noted, but the second post introduces a separate question that remains unaddressed.

Contextual Notes

The discussion does not address the implications of using different coordinate systems in various applications or the potential confusion regarding terminology in higher dimensions.

JasonRox
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Just to make sure I got this right.

Cartesian is the popular x,y,z.

Polar is the one with degrees, and has a circular shape.

Is that it?
 
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Another question I kind of forgot about in High School. :(

When they say nEW, nEN, or xERe?

I know some mean rational, real, or what not.

Can anyone help?
 
The only problem with your first post is that "x,y,z" is three dimensional and polar coordinates are two dimensional.

In two dimensions, the point (x,y) in Cartesian coordinates is (r,θ) in polar coordinates. r is the straight line distance from (0,0) to (x,y) and θ is the angle the line from (0,0) to (x,y) makes with the positive x-axis.
x= r cos(θ) and y= r sin(&theta).
r= √(x2+ y2) and θ= arctan(y/x).

In three dimensions, one can use either "cylindrical coordinates" or "spherical coordinates" as an analog to polar coordinates.
 
Thanks, that helps now.
 

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