Answer
The rectangular form is $2\sqrt{3} - 2i$
Work Step by Step
$4(cos(-30^\circ)$ + $isin(-30^\circ))$
= $4 \cdot \frac{\sqrt{3}}{2}$ + $4 \cdot i \cdot (- \frac{1}{2})$
= $2\sqrt{3} - 2i$
The rectangular form is $2\sqrt{3} - 2i$
Trigonometry (11th Edition) Clone
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
978-0-13-421743-7
ISBN 13:
978-0-13421-743-7
Chapter 8 - Complex Numbers, Polar Equations, and Parametric Equations - Section 8.2 Trigonometric (Polar) Form of Complex Numbers - 8.2 Exercises - Page 371: 41
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