Answer
$\lim_{x\to 1}f(x)=2$
Work Step by Step
We have
$ l(x) \leq f(x)\leq u(x)$
and
$\lim_{x\to 1}l(x)= \lim_{x\to 1}u(x)=2$
Then, by the squeeze theorem, we have
$$\lim_{x\to 1}f(x)=2$$
Calculus (3rd Edition)
by Rogawski, Jon; Adams, Colin
Published by
W. H. Freeman
ISBN 10:
1464125260
ISBN 13:
978-1-46412-526-3
Chapter 2 - Limits - 2.6 Trigonometric Limits - Exercises - Page 76: 1
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