Learn more: http://www.khanacademy.org/video?v=epgwuzzDHsQ
Approximating a function at 0 using a polynomial

Length: 5 minutes

Cosine Taylor Series at 0 (Maclaurin)

Length: 6 minutes

Sine Taylor Series at 0 (Maclaurin)

Length: 6 minutes

Taylor Series at 0 (Maclaurin) for e to the x