Question

27. What is the fourier sine transform of 1/(1+xP)?​

Answer 1

Answer:

Plancherel. Plancherel's formula is Parseval's formula with g = f. This says a function and its Fourier transform have the same L2 form for definitions F+τ1, F-τ1, F+1τ, and F-1τ. For definitions F+11 and F-11 the norm of the Fourier transforms is larger by a factor of √2π.