Algebra and Trigonometry 10th Edition

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

Chapter 6 - Review Exercises - Page 500: 35

Answer

(a) $csc~\theta=3$ (b) $cos~\theta=\frac{2\sqrt 2}{3}$ (c) $sec~\theta=\frac{3\sqrt 2}{4}$ (d) $tan~\theta=\frac{sin~\theta}{cos~\theta}=\frac{\frac{1}{3}}{\frac{2\sqrt 2}{3}}=\frac{1}{2\sqrt 2}=\frac{\sqrt 2}{4}$

Work Step by Step

(a) $csc~\theta=\frac{1}{sin~\theta}=\frac{1}{\frac{1}{3}}=3$ (b) $sin^2~\theta+cos^2~\theta=1$ $\frac{1}{9}+cos^2~\theta=1$ $cos^2~\theta=\frac{8}{9}$ $cos~\theta=\frac{2\sqrt 2}{3}$ (c) $sec~\theta=\frac{1}{cos~\theta}=\frac{1}{\frac{2\sqrt 2}{3}}=\frac{3}{2\sqrt 2}=\frac{3\sqrt 2}{4}$ (d) $tan~\theta=\frac{sin~\theta}{cos~\theta}=\frac{\frac{1}{3}}{\frac{2\sqrt 2}{3}}=\frac{1}{2\sqrt 2}=\frac{\sqrt 2}{4}$
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