Hi, I have succeed in using sine and cosine transforms to calculate the Wigner d functions. To benchmark the code, I compared the time to calculate all associated Legendre polynomials(all l an m) up to l = 149(after that the GSL crashs). I attached a graph of the time taken for both. The code is useful as a tutorial on how to use sine and cosine transforms in ROOT. I will upload it later.
Cheers
Marcelo
