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 - Investigating Algebra Activity - 14.3 Investigating Trigonometric Identities - Draw Conclusions - Page 923: 10



Work Step by Step

Using the definition of a trigonometric identity, the following are identities among the studied equations: $\tan(x)=\frac{\sin(x)}{\cos(x)},\cos(-3x)=\cos(3x),\sin(-x)=-\sin(x),\cos(x-\pi/2)=\sin(x)$.
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