Recall that the Fourier series of a function defined on an interval of te form [-L, L] is of the form ao + Σx=1[an cos(nx) + bn sin(nx)]. Find the Fourier of f(x) in each case. a. x = [-π, 0) f(x) = {º x = [0, π]. E Compare the series with the Fourier sine and cosine series of g(x) = x on [0, π]. b. x = [] f(x) = {₁ x = [-T, π]\[T, 1 Compare the coefficients with the Fourier cosine coefficients of 1 g(x): x = [0, 1] x = (1, π]. -1 c. f(x) = cos x - cos(2x) on [-π, π]. Compare the Fourier coefficients with the Fourier cosine coeffi- cients of the same function on [0, π].

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Recall that the Fourier series of a function defined on an interval of te form [-L, L] is of the form
ao+x=1[an cos(nx) + bn sin(nx)]. Find the Fourier of f(x) in each case.
a.
0
x = [-π,0)
f(x)
=
X
x = [0, π].
Compare the series with the Fourier sine and cosine series of g(x) = x on [0, π].
b.
x = []
f(x) = -1 x = [-T, π]\[T,
Compare the coefficients with the Fourier cosine coefficients of
x = [0, 1]
g(x) =
2) = {₁₂
-1
x = (1, π].
c. f(x)
= COS X
cos(2x) on [−π, π]. Compare the Fourier coefficients with the Fourier cosine coeffi-
cients of the same function on [0, π].
d. f(x) = x². Further, sketch the periodic even and odd extensions of f corresponding to the Fourier
sine and cosine series.
Transcribed Image Text:Recall that the Fourier series of a function defined on an interval of te form [-L, L] is of the form ao+x=1[an cos(nx) + bn sin(nx)]. Find the Fourier of f(x) in each case. a. 0 x = [-π,0) f(x) = X x = [0, π]. Compare the series with the Fourier sine and cosine series of g(x) = x on [0, π]. b. x = [] f(x) = -1 x = [-T, π]\[T, Compare the coefficients with the Fourier cosine coefficients of x = [0, 1] g(x) = 2) = {₁₂ -1 x = (1, π]. c. f(x) = COS X cos(2x) on [−π, π]. Compare the Fourier coefficients with the Fourier cosine coeffi- cients of the same function on [0, π]. d. f(x) = x². Further, sketch the periodic even and odd extensions of f corresponding to the Fourier sine and cosine series.
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