$$$\operatorname{asin}{\left(\frac{1}{2} \right)}$$$
Related calculator: Inverse Sine Calculator
Answer
$$$\operatorname{asin}{\left(\frac{1}{2} \right)} = \frac{\pi}{6}\approx 0.523598775598299$$$A
$$$\operatorname{asin}{\left(\frac{1}{2} \right)} = 30^{\circ}$$$A
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