Calculus: Early Transcendentals (2nd Edition)

Published by Pearson
ISBN 10: 0321947347
ISBN 13: 978-0-32194-734-5

Chapter 1 - Functions - 1.4 Trigonometric Functions and Their Inverse - 1.4 Exercises - Page 48: 15

Answer

-1/2

Work Step by Step

Let's glance at our unit circle. A quick glance tells us the answer is -1/2. Let's check with the calculator. Change the mode to radian, press (COS) then (2), ($\pi$), ($\div$), ($3$). You'll have your answer of -0.5000.
Small 1503713416
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.