Answer
$\frac{2\sqrt3}{3}$.
Work Step by Step
$\tan{60^\circ}+\tan{150^\circ}=\tan{\frac{\pi}{3}}+\tan{\frac{5\pi}{6}}=\sqrt3-\frac{\sqrt3}{3}=\frac{2\sqrt3}{3}$.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 6 - Trigonometric Functions - 6.2 Trigonometric Functions: Unit Circle Approach - 6.2 Assess Your Understanding - Page 379: 86
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