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: 9b


$t=0.75~s$ It represents the time it takes for the pressure to complete an entire cycle.

Work Step by Step

The period of $cos~x$ is $2\pi$ If $x=\frac{8\pi t}{3}$: $\frac{8\pi t}{3}=2\pi$ $t=\frac{3(2\pi)}{8\pi}=\frac{3}{4}$ $t=0.75$
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