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$$$\operatorname{acos}{\left(\frac{1}{2} \right)}$$$
The calculator will find the inverse cosine of $$$\frac{1}{2}$$$ in degrees and radians.
Related calculator: Inverse Cosine Calculator
Answer
$$$\operatorname{acos}{\left(\frac{1}{2} \right)} = \frac{\pi}{3}\approx 1.047197551196598$$$A
$$$\operatorname{acos}{\left(\frac{1}{2} \right)} = 60^{\circ}$$$A
For graph, see the graphing calculator.