Let f(x) be a function of period 27 such that f (x) = x over the interval - T

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.2: Exponential Functions
Problem 31E
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Let f(x) be a function of period 27 such that
f (x) = x over the interval - 7<x < T.
a) Sketch a graph of f(x) in the interval –37 < x < 3a
b) Show that the Fourier series for f(x) in the interval -T <x <T is
1
cos 2.x +
22
1
cos 3.r
32
4 Cos x
..
c) By giving an appropriate value to x, show that
1
= 1+
22
1
1
+...
42
6.
32
Transcribed Image Text:Let f(x) be a function of period 27 such that f (x) = x over the interval - 7<x < T. a) Sketch a graph of f(x) in the interval –37 < x < 3a b) Show that the Fourier series for f(x) in the interval -T <x <T is 1 cos 2.x + 22 1 cos 3.r 32 4 Cos x .. c) By giving an appropriate value to x, show that 1 = 1+ 22 1 1 +... 42 6. 32
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