Answer
$\sqrt{ -1}$, $-1$
Work Step by Step
The imaginary unit $i$ is defined as $ i=\sqrt {-1}$, so $ i^{2}=(\sqrt{-1})^2= -1$.
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 8.1 Complex Numbers - 8.1 Exercises - Page 363: 1
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