Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 7 - Applications of Trigonometric Functions - Section 7.2 The Law of Sines - 7.2 Assess Your Understanding - Page 551: 14

Answer

$C =165^\circ$ $a \approx3.35$ $b \approx1.68$

Work Step by Step

1. Find the third angle $C=180-10-5=165^\circ$ 2. Use the Law of Sines, we have $\frac{a}{sin10^\circ}=\frac{b}{sin5^\circ}=\frac{5}{sin165^\circ}$ 3. $a=\frac{5sin10^\circ}{sin165^\circ}\approx3.35$ 4. $b=\frac{5sin5^\circ}{sin165^\circ}\approx1.68$
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