It is proved that if the Schr\"odinger equation Lψ=λψ of
Calogero-Moser-Sutherland type with L=−Δ+α∈A+∑sin2(α,x)mα(mα+1)(α,α)
has a solution of the product form ψ0=∏α∈A+sin−mα(α,x), then the function F(x)=α∈A+∑mα(α,x)2log(α,x)2 satisfies the
generalised WDVV equations.Comment: 10 page