#### Answer

$-1$

#### Work Step by Step

Note that, $\lim\limits_{x \to a}\sin x=\sin a$ for all real numbers $a$. Using this along with our limit laws, we get
$\lim\limits_{x \to 0}(2\sin x -1 )=2\sin 0 -1=0-1=-1.$

Published by
Pearson

ISBN 10:
0-32187-896-5

ISBN 13:
978-0-32187-896-0

$-1$

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