Answer
$-1.11$
Work Step by Step
In order to get the answer in radians, we want to set the calculator in radians mode, and use the inverse tangent function (round off the result to two decimal places) to obtain:
$\tan^{-1} (-2) \approx -1.11$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 6 - Analytic Trigonometry - Chapter Review - Review Exercises - Page 528: 77
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