Answer
$-45^o$
Work Step by Step
RECALL :
For $y=\tan^{-1}{(x)}$, $y$ must be in the interval $(-90^o, 90^o)$.
Use a scientific calculator's inverse tangent function in degree mode to obtain:
$\theta = \tan^{-1}{(-1)}
\\\theta=-45^o$
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 6 - Test - Page 293: 3b
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