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$$$\operatorname{atan}{\left(-2 \right)}$$$
The calculator will find the inverse tangent of $$$-2$$$ in degrees and radians.
Related calculator: Inverse Tangent Calculator
Answer
$$$\operatorname{atan}{\left(-2 \right)} = - \operatorname{atan}{\left(2 \right)}\approx -1.107148717794091$$$A
$$$\operatorname{atan}{\left(-2 \right)} = -\left(\frac{180 \operatorname{atan}{\left(2 \right)}}{\pi}\right)^{\circ}\approx -63.434948822922011^{\circ}$$$A
For graph, see the graphing calculator.