5Trig IdentitiesAny relationship that is true for all values of the variable for which each side is defined is called an identity. We can use trig identities to simplify trig expressions, prove other identities and solve more complex trig equations.
6Strategies for Simplifying Trig Expressions: 220.127.116.11.5.
7We can factor trigonometric expressions, too! Ex 1: Factor each trig expressionA. B. C.