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

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

$$$\operatorname{atan}{\left(\frac{1}{2} \right)}\approx 0.463647609000806$$$A

$$$\operatorname{atan}{\left(\frac{1}{2} \right)} = \left(\frac{180 \operatorname{atan}{\left(\frac{1}{2} \right)}}{\pi}\right)^{\circ}\approx 26.565051177077989^{\circ}$$$A

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