Elementary Technical Mathematics

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

Chapter 13 - Section 13.3 - Using Trigonometric Ratios to Find Sides - Exercise - Page 458: 1


$$b=40.6m$$ $$c=54.7m$$

Work Step by Step

To find side b, we can use the trigonometric ratio for tangent $tanA=\frac{a}{b}$ Where $A=42.1°$ $a=36.7m$ Solving for b we get: $b=\frac{a}{tanA}$ $b=\frac{36.7m}{tan(42.1°)}$ $b=\frac{36.7m}{0.9036}$ $b=40.6m$ To find side c (the hypotenuse), we can use the trigonometric ratio for sine. $sinA=\frac{a}{c}$ Where $A=42.1°$ $a=36.7m$ Solving for c we get: $c=\frac{a}{sinA}$ $c=\frac{36.7m}{sin(42.1°)}$ $c=\frac{36.7m}{0.6704}$ $c=54.7m$
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