Answer
$1$
Work Step by Step
Convert the angle measure to degrees to obtain:
$=\frac{\pi}{4} \cdot \frac{180^o}{\pi} = 45^o$
Thus,
$\tan{\frac{\pi}{4}}
\\= \tan{45^o}$
From Section 2.1 (page 50) , we learned that:
$\tan{45^o}=1$
Trigonometry (10th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671775
ISBN 13:
978-0-32167-177-6
Chapter 3 - Radian Measure and the Unit Circle - Section 3.1 Radian Measure - 3.1 Exercises - Page 99: 69
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