Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 9 - Polar Coordinates; Vectors - 9.3 The Complex Plane; De Moivre's Theorem - 9.3 Assess Your Understanding - Page 594: 26



Work Step by Step

By computing using the known values: $3\cdot (\cos {(210^\circ)}+i\cdot \sin{(210^\circ))}=3(-\frac{\sqrt3}{2}-i\frac{1}{2})=-\frac{3\sqrt3}{2}-\frac{3}{2}i.$
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