$$$\operatorname{acos}{\left(\frac{4}{5} \right)}$$$

求$$$\operatorname{acos}{\left(\frac{4}{5} \right)}$$$。

$$$\operatorname{acos}{\left(\frac{4}{5} \right)}\approx 0.643501108793284$$$A

$$$\operatorname{acos}{\left(\frac{4}{5} \right)} = \left(\frac{180 \operatorname{acos}{\left(\frac{4}{5} \right)}}{\pi}\right)^{\circ}\approx 36.869897645844021^{\circ}$$$A

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