Calculus Volume 3 · free preview

Triple Integrals in Cylindrical and Spherical Coordinates

Cylindrical coordinates add the z to polar with element r dz dr d theta, and spherical coordinates use rho, theta, phi with element rho squared sin phi, each simplifying the symmetric solids' triple integrals dramatically.

1. Cylindrical coordinates

Cylindrical coordinates

2. Spherical coordinates

Spherical coordinates

3. Choosing the system

Choosing the system

4. The Jacobian in triple form

The Jacobian in triple form

5. Cylindrical volume element

The cylindrical triple integral's volume element dV equals which expression?

6. Spherical ball limits

The ball of radius a in spherical coordinates has which limits?

7. Ball volume integral

The triple integral of 1 over the ball of radius a in spherical coordinates gives which volume?

8. When cylindrical wins

A solid consisting of a cylinder with a paraboloid's cap is most simply integrated in which coordinates?

9. Wrong system consequence

Using the wrong coordinate system for a triple integral typically results in what?

10. Spherical Jacobian factors

The spherical volume element has rho squared sin phi. As a number, how many factors? Answer with a number.

11. Cone phi limit

The cone phi = pi/6 has the ice cream cone's phi ranging from 0 to pi/6. As a fraction of pi, what is the upper limit? Answer like pi/6.

12. Cylinder radius limit

The cylinder x squared + y squared = 4 has cylindrical r from 0 to what number? Answer with a number.

13. Ice cream cone description

The ice cream cone solid, a cone topped by a spherical cap, in spherical coordinates has phi ranging 0 to the cone's half-angle and rho ranging 0 to what?

14. Choice signal

Spherical coordinates win when the solid involves spheres or cones centered where? Answer with one word.

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