1. Evaluating Trigonometric Functions (Precalculus Review 3) September 10th, 2015

2. I. SOH CAH TOA

3. II. Special Right Triangles *To make things simple, use x=1 when evaluating trig ratios.

4. III. Radian Measure

5. Ex. 1: Evaluate each.

6. *To remember which functions are positive in each quadrant: Quad I All (all) Quad II Students (sin) Quad III Take (tan) Quad IV Calculus (cos)

7. IV. Quadrant Angles *Use points on the unit circle to evaluate trig functions for quadrant angles.

8. Ex. 2: Evaluate each.

9. V. Trigonometric identities Reciprocal Identities: Quotient Identities: Pythagorean Identities: Double Angle Identity:

10. VI. Graphs of Trigonometric Functions

12. Vertical Asymptotes: D: All real numbers except