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 \( \frac{1}{2} \).