Find the value the limits with cosine

The video tutorial explains how to replace X with 2 in the cosine function, focusing on the cosine of 2π/3. It discusses the coordinate points for π/3 and analyzes the second quadrant, where the cosine represents the X coordinate. The tutorial concludes by calculating the cosine value as -1/2.

What does cosine represent in terms of coordinates?

What is the value of cosine for the coordinate point in the second quadrant mentioned?