Partial Derivatives: Understanding Tangents

This lecture covers the concept of partial derivatives and their applications in determining tangents to graphs. The instructor explains the definition of partial derivatives, the gradient, and the tangent to a graph. The lecture also discusses the importance of understanding tangents in various scenarios, such as when dealing with open circles and gradients. By the end of the lecture, students will have a clear understanding of how to calculate gradients and tangents to different types of graphs.