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 (11th Edition) Clone
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
978-0-13-421743-7
ISBN 13:
978-0-13421-743-7
Chapter 1 - Trigonometric Functions - Section 1.1 Angles - 1.1 Exercises - Page 9: 121
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