FourierSum[f[x],
{x, L, L}, m]
returns the first m terms of
the Fourier series of f[x] on
[L, L].
NFourierSum[f[x],
{x, L, L}, m]
returns the first m terms of
the Fourier series of f[x] on
[L, L] with numerical coefficients.
FourierCosSum[f[x],
{x, 0, L}, m]
returns the first m
terms of the Fourier cosine series of
f[x] on [0, L].
NFourierCosSum[f[x],
{x, 0, L}, m]
returns the first m terms of
the Fourier cosine series of f[x] on
[0, L] with numerical coefficients.
FourierSinSum[f[x],
{x, 0, L}, m]
returns the first m terms of
the Fourier sine series of f[x] on
[0, L].
NFourierSinSum[f[x],
{x, 0, L}, m]
returns the first m
terms of the Fourier sine series of
f[x] on [0, L] with
numerical coefficients.
