Instructional Video
Khan Academy

Khan Academy: Calculus: Polynomial Approximation of Functions (Part 7)

9th - 10th
Video continues a discussion about the relationship between the polynomial approximations for the sine, cosine and e^x functions from Maclaurin series and uses those to derive Euler's formula and Euler's identity. [10:18]
Instructional Video
Khan Academy

Khan Academy: Calculus: Euler's Formula and Euler's Identity

9th - 10th
Video lesson using the polynomial approximations for the sine, cosine and exponential functions from Maclaurin series to derive Euler's formula and Euler's identity. [11:27]