Answer
sec($\frac{3\pi}{2}$) = undefined
Work Step by Step
Using the unit circle,
sec($\frac{3\pi}{2}$) = undefined
This is because cosine is 0 at $3 \pi /2 $.
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 6 - 6.3 - Trigonometric Functions of Any Angle - 6.3 Exercises - Page 454: 35
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