Pre-Calculus - Evaluting for cosine of the difference of two angles cos195

The video tutorial explains how to find the cosine of the difference between two angles using the unit circle and trigonometric identities. It begins with an introduction to the concept, followed by a detailed explanation of angles and the unit circle. The tutorial then demonstrates how to evaluate the cosine and sine of specific angles, leading to the calculation of the cosine of the angle difference using a formula. The video concludes with the final calculation and a summary of the process.

What is the relationship between the angles U and V in the context of this problem?

Calculate the final answer derived from the cosine of 225 degrees and sine of 30 degrees.