Solving a trigonometric equation with an undefined answer of cosine

The video tutorial explains how to solve quadratic equations by factoring and applying the zero product property. It introduces the concept of the unit circle in trigonometry, emphasizing the importance of understanding its constraints, such as the maximum distance of 1. The tutorial also discusses the domain and range limitations in trigonometry, particularly when finding solutions for cosine values. The instructor highlights the importance of knowing key points on the unit circle and demonstrates how to find solutions for cosine equations using these points.

What is the zero product property and how is it applied in solving equations?

Explain the significance of the unit circle in finding solutions for cosine values.

What does it mean when a solution is not within the domain for cosine values?

How do you determine if a cosine value is valid based on the unit circle?

What are the angles where cosine of X equals zero, and how are they derived?