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 441: 19

Answer

$cos~\theta=\frac{adj}{hyp}=\frac{2\sqrt 6}{5}$ $tan~\theta=\frac{opp}{adj}=\frac{\sqrt 6}{12}$ $cot~\theta=\frac{adj}{opp}=2\sqrt 6$ $sec~\theta=\frac{hyp}{adj}=\frac{5\sqrt 6}{12}$ $csc~\theta=\frac{hyp}{opp}=5$

Work Step by Step

$sin~\theta=\frac{opp}{hyp}$ $\frac{1}{5}=\frac{opp}{hyp}$ Use the pythagorean theorem to find the adjacent side of $\theta$ $5^2=1^2+adj^2$ $adj^2=25-1=24$ $adj=2\sqrt 6$ $cos~\theta=\frac{adj}{hyp}=\frac{2\sqrt 6}{5}$ $tan~\theta=\frac{opp}{adj}=\frac{1}{2\sqrt 6}=\frac{\sqrt 6}{12}$ $cot~\theta=\frac{adj}{opp}=\frac{2\sqrt 6}{1}=2\sqrt 6$ $sec~\theta=\frac{hyp}{adj}=\frac{5}{2\sqrt 6}=\frac{5\sqrt 6}{12}$ $csc~\theta=\frac{hyp}{opp}=\frac{5}{1}=5$
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