Look out for the rocks!

1. Look out for the rocks! Application of Trigonometry by Pete Anderson

2. Did you know . . . … the Lighthouse of Alexandria was one of the Seven Wonders of the Ancient World? Web Source

3. Problem: If a ship can spot the top of a lighthouse at an angle of elevation of 10° and the height of the lighthouse is know to be 150 feet above sea level, then how far from the lighthouse is the ship?

4. Create a Diagram If a ship can spot the top of a lighthouse at an angle of elevation of 10° and the height of the lighthouse is known to be 150 feet above sea level, then how far from the lighthouse is the ship? 10° 150 feet X

5. 150 10° X Writing an Equation pneumonic SOH sin CAH cos T OA tan O H A

6. Solving the Equation

7. 150 10° X Verify Your Solution 

8. Quiz If a lighthouse keeper spots a ship at an angle of depression of 12° and the height of the lighthouse is know to be 175 feet above sea level, then how far from the lighthouse is the ship? • 37 feet • 179 feet • 823 feet • 842 feet

9. 12° 175 feet 12° X Solution to Quiz C