In this lesson you studied how trigonometric models can be used to solve problems. A mathematical model is a representation of a system using mathematical ideas and language. It can take on many forms, such as graphs or equations, as was demonstrated in this lesson. Most models are only an approximation of reality. Understanding the limitations of a model can help you decide how accurate a model's predictions will be.
In Lesson 3 you will learn about trigonometric identities and how to use them to solve problems.