How to find the reference angle of an angle larger than 2pi

The video tutorial explores the concept of angles, focusing on graphing them and understanding coterminal angles. It explains how to break angles into parts, graph them, and identify coterminal angles that share the same initial and terminal sides. The tutorial also covers reference angles, explaining how they are calculated and their significance in angle measurement. The concept of periods and their relation to angle rotation is also discussed, emphasizing the idea that extra rotations do not change the initial or terminal sides of an angle.

What does it mean for an angle to be negative, and how does it affect its position on the graph?

How can you express an angle in terms of a period, and why is this useful?