Answer
True
Work Step by Step
From 0$^{\circ}$ to 90$^{\circ}$, as the angle increases, so does the $tan$ of the angle.
Therefore: $\tan$28$^{\circ}$ $\leq$ $\tan$40$^{\circ}$ is true.
Trigonometry (10th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671775
ISBN 13:
978-0-32167-177-6
Chapter 2 - Acute Angles and Right Triangles - Section 2.1 Trigonometric Functions of Acute Angles - 2.1 Exercises - Page 52: 4
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