$$$\operatorname{atan}{\left(0 \right)}$$$
The calculator will find the inverse tangent of $$$0$$$ in degrees and radians.
Related calculator: Inverse Tangent Calculator
Answer
$$$\operatorname{atan}{\left(0 \right)} = 0$$$A
$$$\operatorname{atan}{\left(0 \right)} = 0^{\circ}$$$A
For graph, see the graphing calculator.