cos(νπ)Pν-μ(x)=2νπ1/2xν-μ(x2-1)μ/2Γ(ν+μ+1)F(12μ-12ν,12μ-12ν+12;12-ν;1x2)-π1/2(x2-1)μ/22ν+1Γ(μ-ν)xν+μ+1F(12ν+12μ+1,12ν+12μ+12;ν+32;1x2),