Answer
$77.831359^\circ$
Work Step by Step
Given $cot\theta=0.21563481$, we have $tan\theta=\frac{1}{cot\theta}$ and $\theta=atan(\frac{1}{0.21563481})\approx77.831359^\circ$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 5 - Trigonometric Functions - 5.3 Trigonometric Functions - 5.3 Exercises - Page 534: 134
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