Implicit Differentiation

In this video, I start out with the basics of implicit differentiation and work up to some more difficult questions including taking the second derivative implicitly.
Timestamps
0:00 Why Implicit Differentiation?
1:21 Basic Examples of Implicit Differentiation
3:55 Derivative of Standard Equation of Circle
6:46 Product Rule Implicitly
8:38 Tangent Line Using Implicit Differentiation
12:33 Second Derivative Implicitly