## Chapter 7: Trigonometric Function Properties and Identities, and Parametric FunctionsThere are three kinds of algebraic properties relating trigonometric functions of one argument. For example, the graphs of y = cos^{2} x and y = sin^{2} x are sinusoids. If you add these two functions together, the result is always 1. In this chapter you'll learn properties you can apply to proving identities and solving trigonometric equations. |