# How do you find r in spherical coordinates?

## How do you find r in spherical coordinates?

These equations are used to convert from spherical coordinates to cylindrical coordinates.

- r=ρsinφ
- θ=θ
- z=ρcosφ

## What is R Theta Phi in spherical coordinates?

Spherical coordinates (r, θ, φ) as commonly used in physics (ISO 80000-2:2019 convention): radial distance r (distance to origin), polar angle θ (theta) (angle with respect to polar axis), and azimuthal angle φ (phi) (angle of rotation from the initial meridian plane). The symbol ρ (rho) is often used instead of r.

**What is r in Cartesian coordinates?**

The coordinate r is the length of the line segment from the point (x,y) to the origin and the coordinate θ is the angle between the line segment and the positive x-axis.

### Where does the derivative in spherical coordinates come from?

Can someone please explain where this comes from? My textbook only says that is a derivative in spherical coordinates. ( r is a position vector and U is the potential energy). This is the gradient operator in spherical coordinates. See: here. Look under the heading “Del formulae.”

### What makes a spherical coordinate system a coordinate system?

In mathematics, a spherical coordinate system is a coordinate system for three-dimensional space where the position of a point is specified by three numbers: the radial distance of that point from a fixed origin, its polar angle measured from a fixed zenith direction, and the azimuth angle of its orthogonal projection on a reference plane that

**What’s the difference between Rho and Rho in spherical coordinates?**

As in physics, ρ ( rho) is often used instead of r, to avoid confusion with the value r in cylindrical and 2D polar coordinates. A globe showing the radial distance, polar angle and azimuthal angle of a point P with respect to a unit sphere, in the mathematics convention. In this image, r equals 4/6, θ equals 90°, and φ equals 30°.

## What is the equation for cylindrical and spherical coordinates?

To make this easy to see, consider point P in the xy -plane with rectangular coordinates (x, y, 0) and with cylindrical coordinates (r, θ, 0), as shown in Figure 12.7.2. Figure 12.7.2: The Pythagorean theorem provides equation r2 = x2 + y2.