$$$\operatorname{acos}{\left(\frac{1}{2} \right)}$$$

求$$$\operatorname{acos}{\left(\frac{1}{2} \right)}$$$。

$$$\operatorname{acos}{\left(\frac{1}{2} \right)} = \frac{\pi}{3}\approx 1.047197551196598$$$A

$$$\operatorname{acos}{\left(\frac{1}{2} \right)} = 60^{\circ}$$$A

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