Jacobi–Anger expansion
AN EXPANSION OF EXPONENTIALS OF TRIGONOMETRIC FUNCTIONS IN THE BASIS OF THEIR HARMONICS
Jacobi-Anger Identity; Jacobi-Anger identity; Jacobi-Anger expansion; Jacobi–Anger identity; Jacobi-Anger Expansion; Jacobi–Anger Expansion; Jacobi-anger expansion
In mathematics, the Jacobi–Anger expansion (or Jacobi–Anger identity) is an expansion of exponentials of trigonometric functions in the basis of their harmonics. It is useful in physics (for example, to convert between plane waves and cylindrical waves), and in signal processing (to describe FM signals).