Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 13 - Section 13.1 - Trigonometric Ratios - Exercise - Page 454: 15

Answer

$ 17.7\ cm .$

Work Step by Step

Using the Pythagorean Theorem, we have: $${a}^2+{b}^2 = {c}^2.$$ Then $$ b = \sqrt{c^2-a^2}=\sqrt{18.9^2-6.71^2}=17.668\ cm \approx 17.7\ cm .$$
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