Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 14 Trigonometric Graphs, Identities, and Equations - 14.5 Write Trigonometric Functions and Models - 14.5 Exercises - Quiz for Lessons 14.3-14.5 - Page 945: 4


$\sec^2 \theta $

Work Step by Step

Re-arrange the given equation as: $=\cos^2 \theta+\sin^2 \theta +\tan^2 \theta$ $=1+\tan^2 \theta$ $=\sec^2 \theta $
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