We will see how to evaluate the infinite series of n/2^n*cos(n*pi/3) by using Euler’s formula 0:00 The trick is to use complex numbers 5:44 The simplification https://youtu.be/pwjPfuRvP6M If the question is to evaluate the series of n/2^n, then we can do this: https://youtu.be/Ch9uCBm-kUE?si=uzhrp...