Concept explainers
To find: how far apart are the towns.
Answer to Problem 23E
The distance between the two towns is 11.81 kilometers.
Explanation of Solution
Given information:
A passenger in an airplane at an altitude of 10 kilometers sees two towns directly to the east of the plane. The angles of depression to the towns are
Calculation:
Consider an airplane at an altitude of 10 kilometers such that the angle of depression to the towns lying directly to the east of the plane is
Note that from the above figure,
Since the tangent of the angle is given by the ratio of the length of the perpendicular to the base
Also, from the above figure
Therefore, the distance between the two towns is
Hence, the distance between the two towns is 11.81 kilometers.
Chapter 4 Solutions
EBK PRECALCULUS W/LIMITS
- Calculus: Early TranscendentalsCalculusISBN:9781285741550Author:James StewartPublisher:Cengage LearningThomas' Calculus (14th Edition)CalculusISBN:9780134438986Author:Joel R. Hass, Christopher E. Heil, Maurice D. WeirPublisher:PEARSONCalculus: Early Transcendentals (3rd Edition)CalculusISBN:9780134763644Author:William L. Briggs, Lyle Cochran, Bernard Gillett, Eric SchulzPublisher:PEARSON
- Calculus: Early TranscendentalsCalculusISBN:9781319050740Author:Jon Rogawski, Colin Adams, Robert FranzosaPublisher:W. H. FreemanCalculus: Early Transcendental FunctionsCalculusISBN:9781337552516Author:Ron Larson, Bruce H. EdwardsPublisher:Cengage Learning