Trigonometry (10th Edition)

Published by Pearson
ISBN 10: 0321671775
ISBN 13: 978-0-32167-177-6

Chapter 8 - Complex Numbers, Polar Equations, and Parametric Equations - Section 8.1 Complex Numbers - 8.1 Exercises - Page 358: 87

Answer

$0+5i$

Work Step by Step

$\frac{-5}{i}=\frac{-5}{i}(\frac{-i}{-i})=\frac{-5\times-i}{i\times-i}=\frac{5i}{-i^{2}}=\frac{5i}{-(-1)}=\frac{5i}{1}=5i=0+5i$ We know that $i^{2}=-1$.
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