What property does a function need to have in order for its Fourier series to contain only cosines? Explain.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.4: Multiple-angle Formulas
Problem 40E
Question
What property does a function need to have in order for its Fourier series
to contain only cosines? Explain.
Transcribed Image Text:What property does a function need to have in order for its Fourier series to contain only cosines? Explain.
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