Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 7 - Trigonometric Identities and Equations - 7.5 Inverse Circular Functions - 7.5 Exercises - Page 709: 64



Work Step by Step

Make sure that the setting for angles is "radians". $\cot^{-1}x$ is evaluated as $\left\{\begin{array}{lll} \tan^{-1}(1/x) & if & x > 0\\ \pi+\tan^{-1}(1/x) & if & x <0 \end{array}\right.$ (x is positive here) Keys: "shift" or "2nd function" "tan" numerical keypad: ($ 1\div$1.0036571) "=" yields $0.783572952917$
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