Answer
2
Work Step by Step
($\frac{1}{2}$ , -$\frac{\sqrt 3}{2}$)
sec $\frac{5\pi}{3}$ is computed by $\frac{1}{x}$.
So sec $\frac{5\pi}{3}$ = $\frac{1}{\frac{1}{2}}$ = 2.
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 4 - Section 4.2 - Trigonometric Functions: The Unit Circle - Exercise Set - Page 547: 14
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