Answer
Not defined
Work Step by Step
The cosine function's range is between 1 and -1 inclusive. Therefore no value in the domain of the inverse exist over 1 or under -1. Thus the value isn't defined.
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 5 - Section 5.5 - Inverse Trigonometric Functions and Their Graphs - 5.5 Exercises - Page 445: 20
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