Summation of Fourier Series Problem: Plotting sm(x) for Multiple m Values

[Jamin2112]

Homework Statement

So, on a Fourier Series problem I came up with

2/3 + (8/π²)∑(1/n²)(-1)ⁿcos(^nπx/₂)

I'm supposed to Plot s_m(x) versus x for m= 5, 10, 20

(m is the index of the summation, which starts at m=1)

Homework Equations

meh

The Attempt at a Solution

The problem is that I don't have a computer program to do this. So I was wondering if someone could give me a link to a site that would do this.

 

[gabbagabbahey]

You might try looking up "gnuplot".