ANSWER
[tex]y = \tan^{ - 1} (x) [/tex]
EXPLANATION
The inverse tangent function has two horizontal asymptotes
[tex]y=\pm \frac{\pi}{2}[/tex]
Therefore it has a range of
[tex]( - \frac{\pi}{2},\frac{\pi}{2} )[/tex]
The second choice is the correct option.
