Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 6 - P.S. Problem Solving - Page 506: 9c


$A=20~millimeters~of~mercury$ It represents the variation of the pressure around 100 millimeters of mercury. That is, the pressure goes from 80 to 120 millimeters of mercury.

Work Step by Step

In the function: $y=y_0+A~cos~Bt$, $|A|$ is the amplitude. In $P=100-20~cos~\frac{8\pi t}{3}$ the amplitude is: $A=|-20|=20$
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