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 - Chapter Review - Page 968: 32



Work Step by Step

Using the given identities and the known values: $\tan (-15^\circ)=\frac{1-\cos(-30^\circ)}{\sin(-30^\circ)}=\frac{1-\frac{\sqrt3}{2}}{-\frac{1}{2}}=\sqrt3-2$
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