$$$\operatorname{acos}{\left(2 \right)}$$$
The calculator will find the inverse cosine of $$$2$$$ in degrees and radians.
Related calculator: Inverse Cosine Calculator
Answer
$$$\operatorname{acos}{\left(2 \right)}\approx 1.316957896924817 i$$$A
$$$\operatorname{acos}{\left(2 \right)} = \left(\frac{180 \operatorname{acos}{\left(2 \right)}}{\pi}\right)^{\circ}\approx \left(75.456129290216892 i\right)^{\circ}$$$A
For graph, see the graphing calculator.