Composition of cosine inverse and tangent

The video tutorial explains how to determine the cosine inverse of negative values, focusing on -1/2. It highlights the importance of understanding the unit circle and reference angles, specifically π/3 and 2π/3. The tutorial also covers calculating the tangent of 2π/3 and emphasizes the need for practice and showing work in quizzes.

What new insight or understanding did you gain from this video?