History Level 0 Page. The science of Trigonometry originated thousands of years ago as Man attempted to measure distances that could not be measured by hand. The need to measure pieces of land and to study the movement of the sun, moon, and stars motivated the development of Trigonometry. Trigonometry is the study of the relationships between angles and distances.
Trigonometric functions are functions associated with the circle.
In this chapter you will study the properties of trigonometric functions. You will learn about the graphs of sine, cosine, and tangent, and how the graphs of these functions depend on certain parameters. You will also study inverse trigonometric functions, trigonometric identities, and polar coordinates. This is a highly interactive course. In many of the lessons you will be able to hear an explanation or see a demonstration.