Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 6 - 6.2 - Right Triangle Trigonometry - 6.2 Exercises - Page 442: 37

Answer

(a) $sin~\theta=\frac{2\sqrt 2}{3}$ (b) $tan~\theta=2\sqrt 2$ (c) $sec~\theta=3$ (d) $csc(90°-\theta)=3$

Work Step by Step

(a) $sin^2\theta+cos^2\theta=1$ $sin^2\theta=1-(\frac{1}{3})^2=\frac{8}{9}$ $sin~\theta=\frac{2\sqrt 2}{3}$ (b) $tan~\theta=\frac{sin~\theta}{cos~\theta}=\frac{\frac{2\sqrt 2}{3}}{\frac{1}{3}}=2\sqrt 2$ (c) $sec~\theta=\frac{1}{cos~\theta}=\frac{1}{\frac{1}{3}}=3$ (d) $csc(90°-\theta)=sec~\theta=3$
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