1. 7.3 More on Trig Functions

2. Example 1 Determine exact values of trig functions of angle that terminates in QIV and 17 8 Q IV Q IV tells us its (–)  -15

3. Example 1 17 8 Q IV  -15

4. Ex 2) Write in terms of the same trig function of the related angle 261  QIII so sin is (–) 261  – 180  = 81  QIV so cos is (+) QII so tan is (–) 218  30 – 180  = 38  30 Ref  always to x-axis (Not y-axis)

5. Summary of 7.3 60  30  SOH CAH TOA

6. Summary of 7.3 180  (-1, 0) 90  (0, 1) 00 (1, 0) 270  (0, -1) 45  x y All POSITIVE Sin CosTan

7. Homework #708 Pg. 407 2, 4, 20, 21, 26, 27 – 39 odd, 42, 43, 46, 49, 51 – 57 odd, 61, 65, 70, 74