Answer
2
Work Step by Step
The algebraic expression for $\cot(\tan^{-1}x)$ involving $x$ only is
$\cot(\tan^{-1}x)=\frac{1}{x}$
Then, we get
$\cot(\tan^{-1}\frac{1}{2})=\frac{1}{1/2}=2$
Trigonometry 7th Edition
by McKeague, Charles P.; Turner, Mark D.
Published by
Cengage Learning
ISBN 10:
1111826854
ISBN 13:
978-1-11182-685-7
Chapter 4 - Section 4.7 - Inverse Trigonometric Functions - 4.7 Problem Set - Page 262: 79
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