Trigonometry (10th Edition)

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

Chapter 1 - Trigonometric Functions - Section 1.3 Trigonometric Functions - 1.3 Exercises: 29

Answer

Sine in the second quadrant is positive

Work Step by Step

1. r is always positive 2. y in the second quadrant is also positive 3. Therefore,$\sin\theta=\frac{y}{r}=-$
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