Bessel function transformation and also cos variation

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SUMMARY

The discussion focuses on the transformation of exponential functions into Bessel functions, specifically addressing the Jacobi-Anger expansion. The user questions the disappearance of the cosine term when setting n=1 and n=-1 in the equations, suggesting that the cosine should not remain in the exponent. The transformation process is clarified by expressing cosine as a sum of exponential functions, leading to a correct interpretation of the equations presented.

PREREQUISITES
  • Understanding of Bessel functions and their properties
  • Familiarity with the Jacobi-Anger expansion
  • Knowledge of complex exponential functions
  • Basic skills in mathematical transformations and manipulations
NEXT STEPS
  • Study the Jacobi-Anger expansion in detail
  • Learn about the properties of Bessel functions
  • Explore the derivation of exponential to Bessel function transformations
  • Investigate the role of cosine in complex exponential expressions
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Mathematicians, physicists, and engineering students who are working with Bessel functions and exponential transformations in their studies or research.

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Homework Statement


In a article I have found this transformation (exp to bessel function) . I have two questions.
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Homework Equations

The Attempt at a Solution



a)where did the Cos go after setting n=1 and n=-1 ? in the third equations ( it is equal to -wmt-pi/2)? why?)
b)how did the writer transform the exp to bessel function?

Thanks[/B]
 
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