Jacobi nd
From specialfunctionswiki
The $\mathrm{nd}$ function is defined by $$\mathrm{nd}(u)=\dfrac{1}{\mathrm{dn}(u)},$$ where $\mathrm{dn}$ is the Jacobi dn function.
The $\mathrm{nd}$ function is defined by $$\mathrm{nd}(u)=\dfrac{1}{\mathrm{dn}(u)},$$ where $\mathrm{dn}$ is the Jacobi dn function.
