Chapter 3 - Section 3.3 - Definition III: Circular Functions - 3.3 Problem Set - Page 145: 60

$0.75$

Using figure $13$, $\sin 2.2$ is approximately $0.8$ (the y-value corresponding to $2.2$ on the circle), $\cos 2.2$ is approximately $-0.6$ (the x-value corresponding to $2.2$ on the circle). Thus approximately $\cot 2.2=\frac{\cos 2.2}{\sin 2.2}=\frac{-0.6}{0.8}=0.75$