Answer
$\angle A = 29.5˚$
Work Step by Step
Let $x = \angle A$
$cos(x) = \frac{6.7}{7.7}$
$x = cos^{-1}(\frac{6.7}{7.7})$
by GDC / calculator
$x = 29.526...˚$
$x = 29.5˚$
$\angle A = 29.5˚$
Trigonometry 7th Edition
by McKeague, Charles P.; Turner, Mark D.
Published by
Cengage Learning
ISBN 10:
1111826854
ISBN 13:
978-1-11182-685-7
Chapter 2 - Section 2.3 - Solving Right Triangles - 2.3 Problem Set - Page 80: 20
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