Answer
$\frac{\pi}{2}, \frac{3\pi}{2}$
Work Step by Step
From the graph plotted before, we can see that $cosx$=0 when x= $\frac{\pi}{2}$and $\frac{3\pi}{2}$.
Trigonometry 7th Edition
by McKeague, Charles P.; Turner, Mark D.
Published by
Cengage Learning
ISBN 10:
1111826854
ISBN 13:
978-1-11182-685-7
Chapter 4 - Section 4.1 - Basic Graphs - 4.1 Problem Set - Page 192: 26
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
