Unit Circle and Cosine

This example dynamically demonstrates the relationship between the coordinates of a point on the unit circle and its cosine value, visually illustrating the definition of the cosine function. Core mathematical concepts include the unit circle, trigonometric functions, right triangles, and coordinate geometry. It utilizes GeoGebra commands and objects such as Intersect, Line, Segment, and Angle, along with objects c, f, O, B, g, C, h, D, i, cosine, text1, α, β. Suitable for high school mathematics teaching, helping students understand the connection between trigonometric functions and the unit circle, deepening their comprehension of the cosine function's definition.