Language: Python

Problem 5.13. Approximate The absolute value f(x) = || can be written as a sum f(x) = 4 2 cos((2n-1)x) (2n - 1)2 Write a program that calculates the first N terms for N = 1, 2, 3, 4 and plots it against the exact function. Let the x-axis be-, with a suitable y-axis. Filename: approx_abs.py