Answer
$$t=\pi $$
Work Step by Step
Using inverse trigonometric functions to solve the equation, we find:
$$ \cos \left(t\right)=-1,\:0\le \:t\le \:2\pi \\ t=\pi +2\pi n \\ t=\pi $$
Functions Modeling Change: A Preparation for Calculus, 5th Edition
by Connally, Eric; Hughes-Hallett, Deborah; Gleason, Andrew M.; Cheifetz, Phil C.
Published by
Wiley
ISBN 10:
1118583191
ISBN 13:
978-1-11858-319-7
Chapter 7 - Trigonometry and Periodic Functions - 7.8 Inverse Trigonometric Functions - Exercises and Problems for Section 7.8 - Exercises and Problems - Page 314: 17
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