Answer
$\approx -0.035+0.197i$
Work Step by Step
Evaluate the trigonometric expressions then simplify to obtain:
$0.2\cdot (\cos (100^\circ)+i\cdot \sin(100^\circ))
\\=0.2(-0.1736481777+0.984807753i)
\\\approx-0.035+0.197i.$
Precalculus (10th Edition)
by Sullivan, Michael
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: 31
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