Answer
Option (a)
Work Step by Step
Note that $\cos{\pi} = -1$.
Thus, the false statement is the one in Option (a).
Trigonometry 7th Edition
by McKeague, Charles P.; Turner, Mark D.
Published by
Cengage Learning
ISBN 10:
1111826854
ISBN 13:
978-1-11182-685-7
Chapter 3 - Section 3.2 - Radians and Degrees - 3.2 Problem Set - Page 135: 107
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