How to find the derivative of a function with sine

The video tutorial explains how to find the derivative of sine of X, which is cosine of X. It begins with an introduction to derivatives, followed by a detailed explanation of why the derivative of sine of X is cosine of X. Finally, it demonstrates the application of this derivative in finding Y times cosine of X.

Explain the relationship between Y and its derivative.

What does Y times cosine of X represent?