Answer
5$\pi$/4
Work Step by Step
1. Subtract a full rotation (equivalent to 2$\pi$)
13$\pi$/4 -2$\pi$ = 5$\pi$/4
Because you subtracted a full rotation these two angles are equivalent to one another.
Calculus (3rd Edition)
by Rogawski, Jon; Adams, Colin
Published by
W. H. Freeman
ISBN 10:
1464125260
ISBN 13:
978-1-46412-526-3
Chapter 1 - Precalculus Review - 1.4 Trigonometric Functions - Preliminary Questions - Page 29: 1
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