Introduction to Right Triangle Trigonometry

Learning Objectives

By the end of this section, you will be able to:

  • Use right triangles to evaluate trigonometric functions.
  • Find function values for [latex]30^\circ \left(\frac{\pi }{6}\right)[/latex], [latex]45^\circ \left(\frac{\pi }{4}\right)[/latex], and [latex]60^\circ \left(\frac{\pi }{3}\right)[/latex].
  • Use right triangle trigonometry to solve applied problems.

In this section, we will see another way to define trigonometric functions using properties of right triangles.