For the following functions, sketch the Fourier cosine series of f(x). Also, roughly ske...

For the following functions, sketch the Fourier cosine series of f(x). Also, roughly sketch the sum of a finite number of nonzero terms (at least the first two) of the Fourier cosine series:

Reference Formula 3.3.22:

Reference Formula 3.3.23:

Reference Formula 3.3.6:

Reference Formula 3.3.7: