Tangent Function Demonstration

This example demonstrates the geometric meaning of the tangent function by showing the relationship between an angle and its tangent value through the intersection of a point on the unit circle with a line. Core mathematical concepts include angles, unit circle, tangent function, and trigonometric functions. Construction highlights the use of GeoGebra commands: Angle, Circle, Line, Intersect, Numerator, Denominator, with objects like θ, A, α, eq1, c, f, B, C, a, b. Suitable for high school mathematics education to understand the definition and properties of the tangent function.