Solving for cosine by factoring

The video tutorial reviews solving trigonometric equations, focusing on finding all solutions rather than just those in the first quadrant. It explains the importance of not dividing by variables, using the zero product property, and determining cosine values using the unit circle. The tutorial also covers the graph of the cosine function and how to write all solutions for trigonometric equations, emphasizing the periodic nature of trigonometric functions.

How do you determine when cosine equals plus or minus one?

What is the significance of the unit circle in solving trigonometric equations?

How can you express all solutions for cosine equations in terms of N?