14 - Reference Angles Explained - Sine, Cosine & Unit Circle - Part 1

Math and Science

More Lessons: http://www.MathAndScience.com Twitter:   / jasongibsonmath   In this lesson, you will learn what a reference angle is and why they are important in trigonometry, precalculus, and calculus. A reference angle is the angle measure from the terminal ray of the angle to the x-axis. It