Answered: A surveyor stands some distance from a…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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A light aircraft was traveling 108 miles per hour straight and level when the pilot measured a landmark at a 4° angle of depression. After 15 minutes the aircraft was directly over the landmark. At what height, to the nearest foot, is the aircraft flying?
In the final seconds before the plane landed in the Hudson, the pilot slowed the plane. While the plane slowed it climbed from 210 ft at 3:29.58 to 370 ft at 3:30.17. An elevation change of 160 ft over a distance of 2000 ft. What was the angle of ascent for the plane (e) as it slowed? Round your answer to the nearest hundredth (second decimal place).
Dean is on a 70 m high bridge and sees two boats anchored at points C and D below. Deanestimates the angle of depression to be 36° for boat C and 40° for boat D. How far apart are theboats?

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A surveyor stands some distance from a tunnel. From this point, she can see both entrances and has measured that one is 388 ft. away, and the other is 212 ft. from her. She measures the angle between the lines of sight to the entrances to be 82°. How long is the tunnel?