Answer
Second-Order
Work Step by Step
Since the second order derivative is present in the equation, it is a second-order differential. The derivative being inside the sin operator doesn't affect the order of the differential.
Differential Equations and Linear Algebra (4th Edition)
by Goode, Stephen W.; Annin, Scott A.
Published by
Pearson
ISBN 10:
0-32196-467-5
ISBN 13:
978-0-32196-467-0
Chapter 1 - First-Order Differential Equations - 1.1 Differential Equations Everywhere - Problems - Page 11: 18
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