Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 5 - Section 5.3 - Double-Angle Formulas - 5.3 Problem Set - Page 296: 17



Work Step by Step

$\cos{2\theta} = \dfrac{119}{169}$ $\sec{2\theta} = \dfrac{1}{\cos{2\theta}} = \dfrac{169}{119}$
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