Answer
See graph, $\sqrt {13}(cos123.7^\circ+i\ sin123.7^\circ)$
Work Step by Step
1. See graph for $z=-2+3i$
2. $z=\sqrt {13}(-\frac{2\sqrt {13}}{13}+\frac{3\sqrt {13}}{13}i)\approx\sqrt {13}(cos123.7^\circ+i\ sin123.7^\circ)$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 8 - Polar Coordinates; Vectors - Section 8.3 The Complex Plane; De Moivre's Theorem - 8.3 Assess Your Understanding - Page 614: 21
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