1π⁢∫02⁢πcos⁡(ν⁢θ-z⁢sin⁡θ)⁢ⅆ⁡θ=(1+cos⁡(2⁢π⁢ν))⁢Jν⁡(z)+sin⁡(2⁢π⁢ν)⁢Eν⁡(z).