Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 6 - Trigonometric Functions - 6.3 Properties of the Trigonometric Functions - 6.3 Assess Your Understanding - Page 395: 80



Work Step by Step

$\tan \alpha \times \cot \alpha =\dfrac {\sin \alpha }{\cos \alpha }\times \dfrac {\cos \alpha }{\sin \alpha }=1$ Therefore, $\tan 10^o\times \cot 10^o=1$
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