Suppose we define a function f(x) by f(x) = a1 sin(x) + a2 sin(2x) +· + an sin(nx), .. for constants a1, a2, ..., An· Show that for each k = 1, 2, ..., n, T = f(x) sin(kæ) dæ. ak

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Let n and m be integers.

Suppose we define a function f(x) by
f(x)
= a1 sin(x) + a2 sin(2x) +·
..+ an sin(nx),
for constants a1, a2, ·
An.
•.• ,
Show that for each k = 1,2,..., n,
1
ak
f(x) dx.
sin(kx)
Transcribed Image Text:Suppose we define a function f(x) by f(x) = a1 sin(x) + a2 sin(2x) +· ..+ an sin(nx), for constants a1, a2, · An. •.• , Show that for each k = 1,2,..., n, 1 ak f(x) dx. sin(kx)
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