Suppose n is a positive integer. Prove that 1 cos x cos 2x cos nx sin x sin 2x sin nx IT is an orthonormal list of vectors in C[-x, ], the vector space of contin- uous real-valued functions on [–T, 1] with inner product IT (f, 8) = | f(x)g(x) dx.
Suppose n is a positive integer. Prove that 1 cos x cos 2x cos nx sin x sin 2x sin nx IT is an orthonormal list of vectors in C[-x, ], the vector space of contin- uous real-valued functions on [–T, 1] with inner product IT (f, 8) = | f(x)g(x) dx.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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![4 Suppose n is a positive integer. Prove that
1
COS X соs 2x
cos nx sin x sin 2x
sin nx
IT
is an orthonormal list of vectors in C[-n, I], the vector space of contin-
uous real-valued functions on [-x, 1] with inner product
(f. g)
=| f(x)g(x)dx.
IT
[The orthonormal list above is often used for modeling periodic phenom-
ena such as tides.]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F29ee2694-db0a-4305-b9d5-e8f15135f6e2%2F4034a95a-2ac0-41dc-a843-e01c88ef4139%2Fgvke3tk_processed.png&w=3840&q=75)
Transcribed Image Text:4 Suppose n is a positive integer. Prove that
1
COS X соs 2x
cos nx sin x sin 2x
sin nx
IT
is an orthonormal list of vectors in C[-n, I], the vector space of contin-
uous real-valued functions on [-x, 1] with inner product
(f. g)
=| f(x)g(x)dx.
IT
[The orthonormal list above is often used for modeling periodic phenom-
ena such as tides.]
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