1. 13.1 Right Triangle Trigonometry The Good Stuff

2. Trigonometric Functions

3. Pythagorean vs. Trigonometry a θ b c

4. Using a calculator to find trig values  sin14˚  cos31˚  tan59˚  sec23˚  csc80˚  cot36˚.2419.8572 1.6643 1.0864 1.0154 1.3764

5. Angle of Elevation vs. Angle of Depression θ α

6. Application 10˚ An airplane is flying at an altitude of 30,000 feet is headed toward an airport. To guide the airplane to a safe landing, the airport’s landing system sends radar signals from the runway to the airplane at a 10˚ angle of elevation. How far away is the airplane (measured along the ground) from the airport runway? 30,000 ft

7. Memory work

8. θsin θcos θtan θcsc θsec θcot θ 30˚ 45˚ 60˚