A look at some application problems using trigonometry.

1. 9.5: Angle of Elevation
and Depression
Objective: Use trigonometry to solve
application problems.
Standard: Geometry 19.0

2. Quick Review:
3 Trig functions:
Finding sides:
Finding angles:

3. Ex. 1) Solve for x and y.
x y
32°
45
Ex. 2) Solve for x and y.
14
9
x°
y

4. Angle of Elevation and Depression
Angles always made with the _________

5. Ex. 3) An airplane is 500 ft. from the runway
and 50 feet off the ground. What is the
angle of depression of the plane?

6. Ex. 4) You are standing 50 ft. from the
library. You measure the angle of elevation
to be 55°. How tall is the library if you are
5 ft. 10 in. tall?

7. Ex. 5) The linear distance
from Mr. Fjelstrom's room
to McDonalds is 2293 ft.
How much farther is it to
walk to the street and
down the road?
2293 ft.
75°

8. Assignment:
- #11 p. 447 #1-18
(all), 31-37 (all)
- Quiz 8.5 on Wed. 2/23
- Chapter 7 Test
correction (Due by
Friday, 2/25)