Third Chebyshev Polynomial

This example demonstrates the graph of the third Chebyshev polynomial. Chebyshev polynomials are a class of important polynomial functions widely used in approximation theory and numerical analysis. The example uses GeoGebra to draw the graph of the third Chebyshev polynomial and labels key points. The construction involves the use of the Text command to add text annotations. Suitable for high school mathematics education and learners.