Answer
$1$
Work Step by Step
$A$ = $\int_0^\frac{\pi}{2}cosxdx$ = $sinx |_0^\frac{\pi}{2}$ = $sin\frac{\pi}{2}-sin0$ = $1$
Calculus (3rd Edition)
by Rogawski, Jon; Adams, Colin
Published by
W. H. Freeman
ISBN 10:
1464125260
ISBN 13:
978-1-46412-526-3
Chapter 5 - The Integral - 5.4 The Fundamental Theorem of Calculus, Part I - Exercises - Page 257: 4
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