Cartesian Co-ordinates and Polar Co-ordinates

In summary, Cartesian coordinates are commonly used in three dimensions, while polar coordinates are used in two dimensions. The point (x,y) in Cartesian coordinates is represented as (r,θ) in polar coordinates, where r is the distance from the origin and θ is the angle from the positive x-axis. In three dimensions, cylindrical or spherical coordinates can be used as an alternative to polar coordinates.
  • #1
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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  • #2
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?
 
  • #3
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.
 
  • #4
Thanks, that helps now.
 

1. What are Cartesian coordinates?

Cartesian coordinates are a system used to locate points on a two-dimensional plane using two perpendicular number lines, known as the x-axis and y-axis.

2. How do you convert Cartesian coordinates to polar coordinates?

To convert Cartesian coordinates (x, y) to polar coordinates (r, θ), use the following equations:
r = √(x² + y²)
θ = tan⁻¹(y/x)
where r is the distance from the origin and θ is the angle formed with the positive x-axis.

3. What are polar coordinates?

Polar coordinates are a system used to locate points on a two-dimensional plane using a radius (r) and an angle (θ) from a fixed point, known as the pole or origin.

4. How do you convert polar coordinates to Cartesian coordinates?

To convert polar coordinates (r, θ) to Cartesian coordinates (x, y), use the following equations:
x = rcos(θ)
y = rsin(θ)
where r is the distance from the origin and θ is the angle formed with the positive x-axis.

5. What are the advantages of using polar coordinates over Cartesian coordinates?

Polar coordinates are often preferred for representing circular or radial data, such as in polar graphs or in navigation systems. They also allow for a more intuitive representation of points in terms of distance and direction from a fixed point, rather than absolute values on a number line.

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