Multivariable Function Surfaces and Traces Demo

This example demonstrates the geometric shapes of multivariable function surfaces and their traces on different coordinate planes. The core mathematical concepts involved include multivariable functions, continuity, applications of trigonometric functions, surface area calculation, and statistical characteristics analysis. The key construction point is using GeoGebra's IntersectPath command to visualize the intersection points between a path and the surface. Suitable for teaching demonstrations in calculus, advanced mathematics, and related courses to help students intuitively understand abstract mathematical concepts.