Answer
-90$^{\circ}$ is between 3rd and 4th quadrants.
Work Step by Step
Coterminal angles always in the same quadrant with original angle, therefore
-90$^{\circ}$+360$^{\circ}$=270$^{\circ}$
-90$^{\circ}$-360$^{\circ}$=-450$^{\circ}$
Trigonometry (10th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671775
ISBN 13:
978-0-32167-177-6
Chapter 1 - Trigonometric Functions - Section 1.1 Angles - 1.1 Exercises - Page 9: 117
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter 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.
