Trigonometry: Sine, Cosine, Tangent

This example demonstrates the definitions and relationships of sine, cosine, and tangent functions in right-angled triangles. Key math concepts include the definition of trigonometric functions, the relationship between side lengths in right triangles, and angle measurement. GeoGebra commands used are Polygon, Angle, and objects like points A, B, angles θ_1, t1, c, a, b, and texts. It is suitable for high school students learning trigonometric basics and introductory calculus education.