Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 8 - Section 8.2 - Trigonometric Form for Complex Numbers - 8.2 Problem Set - Page 432: 31


$\frac{\sqrt{2}}{2} - \frac{\sqrt{2}}{2}i$

Work Step by Step

$1cis\frac{7\pi}{4}$ = $1(cos\frac{7\pi}{4} + isin\frac{7\pi}{4})$ = $\frac{\sqrt{2}}{2} - \frac{\sqrt{2}}{2}i$
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