Answer
False
Work Step by Step
$\tan ^{2} (72^{\circ} 25') + 1 = \sec ^{2} (72^{\circ}25')$
$9.957710155 + 1 \ne 0.091259944264$
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 2.3 Finding Trigonometric Function Values Using a Calculator - 2.3 Exercises - Page 65: 56
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