Answer
$2$
Work Step by Step
$\int ^{\frac {\pi }{4}}_{-\frac {\pi }{4}}sec^{2}tdt=\tan t]^{\pi /4}_{-\pi /4}=1-\left( -1\right) =2$
Calculus 10th Edition
by Larson, Ron; Edwards, Bruce H.
Published by
Brooks Cole
ISBN 10:
1-28505-709-0
ISBN 13:
978-1-28505-709-5
Chapter 4 - Integration - Review Exercises - Page 313: 50
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