Answer
$0$
Work Step by Step
Graph $\cos(x)$.
Graph $\frac{1}{2}(e^{x}+e^{-x})$.
Find the intersections:
$x=0$
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 7 - Section 7.5 - More Trigonometric Equations - 7.5 Exercises - Page 575: 62
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