Simplify the trig expression by using the co function identity

The video tutorial explains the use of cofunction identities in trigonometry, focusing on the relationship between sine and cosine. It further explores the concept of reciprocals, particularly between secant and cosine, and demonstrates how these properties can be applied to solve equations.

How does the function multiplied by a circle relate to the value of 1?

What is the significance of the angles in sine and cosine functions?