MIT grad shows HOW to use the chain rule to find the derivative and WHEN to use it. To skip ahead: 1) For how to use the CHAIN RULE or [br]"OUTSIDE-INSIDE rule", skip to time [url=https://www.youtube.com/watch?v=TUJgZ4UDY2g#]0:17[/url]. 1b) For how to know WHEN YOU NEED the chain rule, skip to time [url=https://www.youtube.com/watch?v=TUJgZ4UDY2g#]4:35[/url]. 2) For another example with the POWER RULE in the chain rule, skip to time [url=https://www.youtube.com/watch?v=TUJgZ4UDY2g#]7:05[/url]. 3) For a TRIG derivative chain rule example, skip to time [url=https://www.youtube.com/watch?v=TUJgZ4UDY2g#]9:33[/url]. 3b) For the formal chain rule FORMULA, skip to time [url=https://www.youtube.com/watch?v=TUJgZ4UDY2g#]11:36[/url]. PS) For a DOUBLE CHAIN RULE (or "repeated use of the chain rule") example, skip to time [url=https://www.youtube.com/watch?v=TUJgZ4UDY2g#]13:33[/url].