arccos 1/2

The value of \( \arccos\left(\frac{1}{2}\right) \) is \( \frac{\pi}{3} \) radians or \( 60^\circ \). This is because the cosine of \( 60^\circ \) (or \( \frac{\pi}{3} \) radians) is \( \frac{1}{2} \).