In this video, we provide essential "math help" by explaining how to "graph" functions, beginning with a basic cosine wave ...

In this video, we provide essential "math help" by explaining how to "graph" piecewise functions. This "math tutorial" breaks ...

Of course this produces the same derivative values as the usual limit-based definitions of the derivative. What makes this possibly preferable to the usual formulas, though, is that it arises out of ...