5.1 Using Fundamental Identities

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Presentation transcript:

5.1 Using Fundamental Identities Evaluating trig functions Simplifying trig expressions Solve trig equations

Reciprocal Identities

Quotient Identities

Pythagorean identities

Cofunction Identities

Even/Odd identities

Evaluating Use a given value with an identity to find another trig value You can also draw a right triangle

Simplifying Look for a common factor to factor out Try to write the expression in terms of only 1 trig function Try to rewrite the expression using only sin and cos Substitute values from trig identities

Factoring Rewrite the expression in terms of 1 trig function Substitute variables for the trig functions to write the expression in polynomial form Factor the polynomial and then substitute back in the trig function