About This Lesson
http://www.freemathvideos.com In this video series I show you how to add and subtract rational trigonometric expressions and then simplify by using identities. When adding rational expressions it is important to have like terms Trigonometric identities help us transform expressions so that we can simplify an expression to a singular term. We will apply reciprocal, quotient, pythagorean, cofunction, and even/odd identities.
