Trigonometry (11th Edition)
Trigonometry (11th Edition)
11th Edition
ISBN: 9780134217437
Author: Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher: PEARSON
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Answer numbers 1 & 3 only.
1. The angle of elevation from point A to the top of a hill is 49°.
If point A is 400 feet from the base of the hill, how high is
the hill?
400 ft
2. Find the angle of elevation of the sun when a 12.5-meter-tall
telephone pole casts an 18-meter-long shadow.
sun
12.5 m
18 m
3. A ladder leaning against a building makes an angle of 78°
with the ground. The foot of the ladder is 5 feet from the
building. How long is the ladder?
/78H
4. A person whose eyes are 5 feet above the ground is standing
on the runway of an airport 100 feet from the control tower.
That person observes an air traffic controller at the window
of the 132-foot tower. What is the angle of elevation?
132 t
5 ft
100 ft
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Transcribed Image Text:1. The angle of elevation from point A to the top of a hill is 49°. If point A is 400 feet from the base of the hill, how high is the hill? 400 ft 2. Find the angle of elevation of the sun when a 12.5-meter-tall telephone pole casts an 18-meter-long shadow. sun 12.5 m 18 m 3. A ladder leaning against a building makes an angle of 78° with the ground. The foot of the ladder is 5 feet from the building. How long is the ladder? /78H 4. A person whose eyes are 5 feet above the ground is standing on the runway of an airport 100 feet from the control tower. That person observes an air traffic controller at the window of the 132-foot tower. What is the angle of elevation? 132 t 5 ft 100 ft
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