10th Edition

ISBN: 9780321979070

Author: Michael Sullivan

Publisher: PEARSON

Concept explainers

A ratio is a comparison between two numbers of the same kind. It represents how many times one number contains another. It also represents how small or large one number is compared to the other.

Trigonometric Ratios

Trigonometric ratios give values of trigonometric functions. It always deals with triangles that have one angle measuring 90 degrees. These triangles are right-angled. We take the ratio of sides of these triangles.

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Textbook Question

Chapter 8, Problem 32RE

Finding the Height of a Helicopter Two observers simultaneously measure the angle of elevation of a helicopter. One angle is measured as $25 °$ , the other as $40 °$ (see the figure). If the observers are 100 feet apart and the helicopter lies over the line joining them, how high is the helicopter?

Chapter 8, Problem 32RE, Finding the Height of a Helicopter Two observers simultaneously measure the angle of elevation of a

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Chapter 8, Problem 31RE

Chapter 8, Problem 33RE

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Chapter 8 Solutions

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Finding the Height of a Helicopter Two observers simultaneously measure the angle of elevation of a helicopter. One angle is measured as 25 ° , the other as 40 ° (see the figure). If the observers are 100 feet apart and the helicopter lies over the line joining them, how high is the helicopter?

Solution Summary: The author explains how two observers measure the angle of elevation of a helicopter. The helicopter is about 29.97 feet high.

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Chapter 8 Solutions