Rotation of Surface about x-axis

This example demonstrates how to generate a 3D shape by rotating a surface around the x-axis. The core mathematical concepts involved include rotation, surface, calculus, and the unit circle. The construction uses commands and objects such as Angle, Surface, f, g, a, angle, b in GeoGebra. It is suitable for high school and above students to learn and understand the concept of solids of revolution in solid geometry and calculus.