Answer
1/2
Work Step by Step
The point (1/27,$π^3$) is in the equation's domain, so plug the point into the equation to evaluate the limit:
$cos(\sqrt[3] ( π^3/27) )=cos (π/3)=1/2$
Thomas' Calculus 13th Edition
by Thomas Jr., George B.
Published by
Pearson
ISBN 10:
0-32187-896-5
ISBN 13:
978-0-32187-896-0
Chapter 14: Partial Derivatives - Section 14.2 - Limits and Continuity in Higher Dimensions - Exercises 14.2 - Page 796: 10
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