Answer
See explanations.
Work Step by Step
Because $sec^{-1}10=asec10=acos(\frac{1}{10})$, we can use a calculator to get $sec^{-1}10\approx84.26^\circ$
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 - Chapter 5 Test Prep - Review Exercises - Page 561: 58
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