Answer
$\approx 1.970+0.347i$
Work Step by Step
Using a calculator:
$2\cdot (\cos (\frac{\pi}{18})+i\cdot \sin(\frac{\pi}{18}))
\\=2(0.984807753+i\cdot0.1736481777)
\\\approx1.970+0.347i$
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: 33
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