Answer
$3i$
Work Step by Step
Step 1: $\sqrt (-9)$
Step 2: $\sqrt (-1\times9)$
Step 3: $\sqrt -1\times\sqrt 9$
Step 4: As $i=\sqrt -1$, the expression becomes $i\times3$ or $3i$
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 - Review Exercises - Page 409: 1
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