Trigonometry (10th Edition)

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

Chapter 4 - Graphs of the Circular Functions - Section 4.1 Graphs of the Sine and Cosine Functions - 4.1 Exercises - Page 145: 51

Answer

approximately 6 pm, approximately 0.2 feet

Work Step by Step

On January 20, the lowest point on the graph occurs at approximately 6 pm. Since the lowest point on the graph corresponds to the low tide, this means that the low tide occurs at approximately 6 pm. According to the graph, the height that corresponds to this lowest point on the graph is approximately 0.2 feet.
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