\[y={(\tan^{-1}{(x)})}^{2}\]

Available Methods
Graph
Intercepts
Asymptotes
Domain
Range
1
Notice the horizontal asymptote at y=2.467401y=2.467401.
y=2.467401y=2.467401

2
By inspecting the graph, the range is:
y0,y2.467401y\ge 0,y\ne 2.467401

Done

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