# What is the parameterization of a sphere?

## What is the parameterization of a sphere?

These are parametric equations of a plane. x = sinφcosθ y = sinφsinθ z = cosφ. gives parametric equations for the unit sphere. x = r sinucosv y = r sinusinv z = r cosu 0 ≤ u ≤ π, 0 ≤ v ≤ 2π will give a sphere of radius r.

How do you parameterize spherical coordinates?

The grid curves are latitude and longitude lines, as in spherical coordinates. y 3 = sinφsinθ or y = 3 sinφsinθ z = cosφ z = cosφ That is, we get the parameterization r(φ, θ) = 〈2 sinφcosθ,3 sinφsinθ,cosφ〉 0 ≤ φ ≤ π, 0 ≤ θ < 2π.

### What is parameterization example?

Example 1. Find a parametrization of the line through the points (3,1,2) and (1,0,5). Solution: The line is parallel to the vector v=(3,1,2)−(1,0,5)=(2,1,−3). Hence, a parametrization for the line is x=(1,0,5)+t(2,1,−3)for−∞.

How do you denote a sphere?

Answer: The equation of a sphere in standard form is x2 + y2 + z2 = r2. Let us see how is it derived. Explanation: Let A (a, b, c) be a fixed point in the space, r be a positive real number and P (x, y, z ) be a moving point such that AP = r is a constant.

#### What is the equation for a sphere?

How do you write a parameterization?

We usually write this condition for x being on the line as x=tv+a. This equation is called the parametrization of the line, where t is a free parameter that is allowed to be any real number. The idea of the parametrization is that as the parameter t sweeps through all real numbers, x sweeps out the line.

## What is the parametrization of a curve?

A parametrization of a curve is a map r(t) = from a parameter interval R = [a, b] to the plane. The functions x(t), y(t) are called coordinate functions. The image of the parametrization is called a parametrized curve in the plane.

What is a parametrization of a curve?

### How do you make a parametric equation of a circle?

Lesson Summary

1. The parametric equation of the circle x2 + y2 = r2 is x = rcosθ, y = rsinθ.
2. The parametric equation of the circle x 2 + y 2 + 2gx + 2fy + c = 0 is x = -g + rcosθ, y = -f + rsinθ.

What is the SA of a sphere?

Surface area of a sphere: A = 4πr.

#### How do you write a parametrization?

So, x−a is parallel to v if and only if x−a=tv for some t∈R. We usually write this condition for x being on the line as x=tv+a. This equation is called the parametrization of the line, where t is a free parameter that is allowed to be any real number.

What is the use of parametrization?

A simple way to visualize a scalar-valued function of one or two variables is through their graphs. In a graph, you plot the domain and range of the function on the same set of axes, so the value of the function for a value of its input can be immediately read off the graph.

The sphere of radius centered at the origin is given by the parameterization The idea of this parameterization is that as sweeps downward from the positive z -axis, a circle of radius is traced out by letting run from 0 to To see this, let be fixed.

## How to parametrize the radial direction of a sphere?

x =x(u,v) y =y(u,v) z =z(u,v) x = x ( u, v) y = y ( u, v) z = z ( u, v) Example 1 Determine the surface given by the parametric representation. →r (u,v) =u→i +ucosv→j +usinv→k r → ( u, v) = u i → + u cos. ⁡. v j → + u sin. ⁡. v k →. Show Solution. Let’s first write down the parametric equations.

What is the parametric equation of a sphere?

– as the intersection of a sphere with a quadratic cone whose vertex is the sphere center; – as the intersection of a sphere with an elliptic or hyperbolic cylinder whose axis passes through the sphere center; – as the locus of points whose sum or difference of great-circle distances from a pair of foci is a constant.

### What is the equation of a sphere in standard form?

x2 + y2 + z2 = r2. which is called the equation of a sphere. If (a, b, c) is the centre of the sphere, r represents the radius, and x, y, and z are the coordinates of the points on the surface of the sphere, then the general equation of a sphere is (x – a)² + (y – b)² + (z – c)² = r².