Evaluate the cosine inverse of 1/2

The video tutorial explains how to find the cosine inverse of 1/2. It begins by introducing the concept of cosine inverse and its relation to angles. The instructor discusses the unit circle and the angles that satisfy the cosine equation. The tutorial emphasizes the importance of understanding the restricted range of the inverse function, leading to the conclusion that the cosine inverse of 1/2 is π/3.

What is the reference angle associated with the cosine of 1/2?

Why does the calculator not provide multiple answers for the cosine inverse function?