Trigonometry (10th Edition)

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

Chapter 1 - Review Exercises: 20



Work Step by Step

$\frac{6}{a}=\frac{7}{7+11}$ Take similar triangles and correspond the sides $\frac{6}{a}=\frac{7}{18}$ 7a=108 a=15.4
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