Fourier Transform: Steps to Find the Solution for Given Functions

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SUMMARY

The discussion focuses on the steps to find the Fourier Transform of a given even function. It emphasizes that only cosine terms are relevant due to the function's even nature and periodicity, leading to an infinite sum represented as f(x) = ∑_n a_n cos(n π x / L). To determine each coefficient a_n, one must compute the integral of the function over a period, multiplied by the corresponding cosine component, leveraging the orthogonality of the functions involved.

PREREQUISITES
  • Understanding of Fourier Transform concepts
  • Knowledge of periodic functions and their properties
  • Familiarity with integral calculus
  • Basic principles of orthogonality in function spaces
NEXT STEPS
  • Study the derivation of Fourier series for periodic functions
  • Learn about the properties of orthogonal functions
  • Explore the application of Fourier Transform in signal processing
  • Investigate numerical methods for computing Fourier coefficients
USEFUL FOR

Students in mathematics or engineering, particularly those studying signal processing, and anyone seeking to understand the practical application of Fourier Transforms in analyzing periodic functions.

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Homework Statement



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Homework Equations



i cannot start with the q



The Attempt at a Solution



how to find the Fourier transform of the given function?

i don't want the MATLAB code, i want to know how to actually find the Fourier transform of this function
 
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for starters as its an even function you only need consider cosine terms, and as its periodic only terms with an integer multiple of period will constribute so you will end up with an infinite sum something like
f(x) = \sum_n a_n cos(\frac{n \pi x}{ L})

to find each coefficient, find the integral over a period of the function multiplied by the corresponding cosine component. This works as the functions are all orthogonal to each other
 
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