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: 11



Work Step by Step

Using the Pythagorean Theorem, we can plug in our variable and then solve: $${a}^2+{b}^2 = {c}^2$$ $${45.0}^2+{b}^2 = {75.0}^2$$ Rearranging gives, $${b} = \sqrt{{75.0}^2-{45.0}^2}$$ The answer, to 3 significant digits is $$b = 60.0$$
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