Trigonometry (10th Edition)

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

Chapter 5 - Trigonometric Identities - Section 5.4 Sum and Difference Identities for Sine and Tangent - 5.4 Exercises - Page 223: 80a

Answer

$V = (30~sin~120~\pi t)+(40~cos~120~\pi t)$ We can see a sketch of the graph of this function below:

Work Step by Step

$V = V_1+V_2$ $V = (30~sin~120~\pi t)+(40~cos~120~\pi t)$ We can see a sketch of the graph of this function below:
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