Unit Circle Half Angle Diagram

This example demonstrates the geometric representation of half-angle formulas in the unit circle, dynamically showing the relationship between half-angle trigonometric values and the original angle. Core mathematical concepts include the unit circle, trigonometric functions, half-angle formulas, and complex number representations. Construction highlights involve GeoGebra commands/objects like Intersect, Circle, Point, Vector, Segment, Ray, and Angle. Suitable for high school mathematics education to understand the geometric meaning of trigonometric functions and the application of half-angle formulas.