Trigonometry (10th Edition)

Published by Pearson
ISBN 10: 0321671775
ISBN 13: 978-0-32167-177-6

Chapter 1 - Trigonometric Functions - Section 1.4 Using the Definitions of the Trigonometric Functions - 1.4 Exercises - Page 38: 106

Answer

Angle is in the quadrant III.

Work Step by Step

1. Since sine is negative; y must be negative as well, which is in the QIII and QIV. 2. For tangent to be positive, x and y must be both either positive (as in QI) or negative (QIII). 3. The only quadrant that satisfies both conditions QIII.
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