This lesson focuses on verifying trigonometric identities using the fundamental and Pythagorean identities. The instructor takes a complex fraction and simplifies it by multiplying the numerator and denominator by the least common multiple of both denominators. The instructor then factors and cancels to get the same answer on both sides. The lesson emphasizes the importance of keeping in mind where you're trying to end up as you work through the problem.
Shows steps for proving (or verifying) Trigonometric Identities;
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com