Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 4 - Section 4.8 - Applications of Trigonometric Functions - Exercise Set - Page 637: 9


$ c=26.96;A=23.6^{\circ}; B=66.4^{\circ}$

Work Step by Step

The trigonometric ratios are as follows: $\sin \theta= \dfrac{opposite}{hypotenuse}$ ; $\cos \theta= \dfrac{Adjacent}{hypotenuse}$ and $\tan \theta= \dfrac{Opposite}{Adjacent}$ $\tan A=\dfrac{10.8}{24.7}=0.4372 \implies A=23.6^{\circ}$ So, $ B=90^{\circ}- 23.6^{\circ}=66.4^{\circ}$ and $ c=\dfrac{24.7}{\cos 23.6^{\circ}}=26.96$ Thus, $ c=26.96;A=23.6^{\circ}; B=66.4^{\circ}$
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