In this lesson, Julie Harland uses trigonometric identities to solve problems involving tangent, sine, cosine, and cotangent. Through the use of these identities, she is able to find the exact values of these functions for given angles. While some of the problems are more involved, Harland stresses the importance of knowing these identities to solve them quickly and efficiently.
Using Trig Identities to make computations.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com