Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 4 - Section 4.2 - Trigonometric Functions: The Unit Circle - Exercise Set: 12

Answer

-$\frac{2\sqrt 3}{3}$

Work Step by Step

(-$\frac{1}{2}$ , -$\frac{\sqrt 3}{2}$) csc $\frac{4\pi}{3}$ is computed by $\frac{1}{y}$ So csc $\frac{4\pi}{3}$ = $\frac{1}{-\frac{\sqrt 3}{2}}$ = -$\frac{2\sqrt 3}{3}$
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