Trigonometric Values in All Four Quadrants: Introduction
In this section we will work further with the unit circle by finding the sine and cosine of all the major angles in the four quadrants. The unit circle is a helpful tool in finding these trigonometric ratios without the use of calculators. In order to work with the unit circle we will first go through two special right triangles and will learn the process of rationalizing the denominator.
© 2009 KC Distance Learning. All rights reserved.
