Answer
-1
Work Step by Step
tan(15pi/4)= tan(675°)
According to the unit circle 675° would be the 45° triangle on the IV quadrant; therefore tan(675°) would -1.
Calculus: Early Transcendentals (2nd Edition)
by Briggs, Bill L.; Cochran, Lyle; Gillett, Bernard
Published by
Pearson
ISBN 10:
0321947347
ISBN 13:
978-0-32194-734-5
Chapter 1 - Functions - 1.4 Trigonometric Functions and Their Inverse - 1.4 Exercises - Page 48: 18
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