The angle of elevation of the top point D of a tower A is 23°30'. From another point B the angle of elevation of the top of the tower is 55°30'. The points A and B are 217.45 m. apart and on the same horizontal plane as the foot (point C) of the tower. The horizontal angle subtended by A and B at the foot of the tower is 90°. Find the height of the tower CD

Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE: 1. Give the measures of the complement and the supplement of an angle measuring 35°.
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The angle of elevation of the top point D of a tower A is 23°30'. From another point B the angle of elevation of the top of the tower is 55°30'. The points A and B are 217.45 m. apart and on the same horizontal plane as the foot (point C) of the tower. The horizontal angle subtended by A and B at the foot of the tower is 90°. Find the height of the tower CD
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