Volume by Rotation Calculator

Compute the volume of a solid obtained by rotating a function about the x-axis or y-axis using the disk/washer method.

Formulas:

Disk Method: V = π ∫[a to b] [f(x)]² dx
Washer Method: V = π ∫[a to b] ([f(x)]² - [g(x)]²) dx

Where:
- f(x) = outer function
- g(x) = inner function (for washer)
- a, b = integration limits

Use standard math notation for functions. Select axis and method. Inner function is only required for washer method.