Trigonometric Function Definition

This example demonstrates the definition of trigonometric functions on the unit circle, showing the geometric meaning of sine, cosine, and tangent through the dynamic movement of a point on the circle. Key concepts include the unit circle, angles, trigonometric values, and the relationship between the sides of a right triangle. The construction uses commands and objects such as Circle, Point, Mod, CurveCartesian, Segment, Angle, Intersect, Ray, CircleArc, OrthogonalLine, perpendicular segment, Mirror, and Vector. It is suitable for high school students to learn and understand the basic definition and geometric representation of trigonometric functions, as well as for teaching parametric equations and analytical geometry.