Denote the second Fourier cosine coefficient on the interval [-L, L] by L A2 f(x) cos -dx. -L Show that for the function f(x)= eL¤ 2L3 sinh(L?). A2 = L4 + 47²

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.6: Additional Trigonometric Graphs
Problem 53E
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Denote the second Fourier cosine coefficient on the interval [-L, L] by
L
A2
f(x) cos
-dx.
-L
Show that for the function f(x)= eL¤
2L3
sinh(L?).
A2 =
L4 + 47²
Transcribed Image Text:Denote the second Fourier cosine coefficient on the interval [-L, L] by L A2 f(x) cos -dx. -L Show that for the function f(x)= eL¤ 2L3 sinh(L?). A2 = L4 + 47²
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