12. From point B, Bob uses a clinometer to determine the angle of elevation to the top of a cliff as 38°. From point D, 68.5 m away from Bob, Dana estimates the angle CDB to be 42°, while Bob estimates that the angle CBD to be 63°. Find the height of the cliff. h 38 63 42 68.5 m D

12. From point B, Bob uses a clinometer to determine the angle of elevation to the top of a cliff as 38°. From point D, 68.5 m away from Bob, Dana estimates the angle CDB to be 42°, while Bob estimates that the angle CBD to be 63°. Find the height of the cliff. h 38 63 42 68.5 m D

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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Question

12. From point B, Bob uses a clinometer to determine the angle of elevation to the top of a cliff as 38°. From point
D, 68.5 m away from Bob, Dana estimates the angle CDB to be 42°, while Bob estimates that the angle CBD to be
63°. Find the height of the cliff.
h
38
63
42
68.5 m
D

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