Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 5 - Trigonometric Functions - Chapter Test - Page 460: 16


$ \approx 2.747$

Work Step by Step

We are asked to use a calculator to compute the result in radian mode and then round-off the result to three decimal places. We get: $\cot (\dfrac{ 28 \pi}{9})=\dfrac{1}{\tan (\dfrac{ 28 \pi}{9})} =2.74747741945 \approx 2.747$
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