1. Chapter 4.7 Solutions of Triangles

2. Trigonometric Functions

4. Right Triangles

7. Solving Triangles

8. Example 4.7.1

9. Angle of Elevation

10. Angle of Depression

11. Example 4.7.2 To measure cloud altitude at night, a vertical beam of light is directed on a spot on the cloud. From a point 135 ft away from the light source, the angle of elevation to the spot is found to be 67.35 o. Find the distance of the cloud from the ground.

13. Example 4.7.3 An aerial photographer who photographs farm properties for a real estate company has determined from experience that the best photo is taken at a height of approximately 475 ft and a distance of 850 ft from the farmhouse. What is the angle of depression from the plane to the house.

15. Oblique Triangles

17. Law of Sines

18. Law of Cosines

19. Example 4.7.4