How to determine a point given the angle by not memorizing the unit circle

The video tutorial reviews graphing practice and demonstrates how to graph the angle 4π/3. It explains how to find the reference angle, which is π/3, and discusses the importance of this angle in calculating the sine. The tutorial uses the unit circle to find the sine value, √3/2, and considers the quadrant to determine the sign of the sine value. The session concludes with a summary of the sine calculation process.

What is the Y coordinate at Pi over three on the unit circle?

In which quadrant is the angle four Pi over three located, and should the Y coordinate be positive or negative?