Let's evaluate: $\cos \left(\arcsin \left(\frac{1}{2}\right)\right)$

ⓘ acos, asin and atan give the angle whose cosine, sine or tangent is the number, here a remarkable value: $\arcsin \left(\frac{1}{2}\right)$ = $\frac{\pi }{6}$

$\cos \left(\frac{\pi }{6}\right)$

ⓘ The cosine is the x-coordinate (horizontal axis) of the point reached on the unit circle after a rotation of $\frac{\pi }{6}$ radians from the horizontal axis pointing to the right, this is a remarkable value: $\cos \left(\frac{\pi }{6}\right)$ = $\frac{\sqrt{3}}{2}$

▶Result:   $\frac{\sqrt{3}}{2}$

The numeric value of: $\frac{\sqrt{3}}{2}$ equals:

$\frac{\approx 1.7321}{2}$

▷ $\approx 0.8660$