MathieuCPrime
MathieuCPrime[a, q, z] gives the derivative with respect to z of the even Mathieu function with characteristic value a and parameter q.
Examples
MathieuCPrime[1, 0.5, 0.3]Plot[MathieuCPrime[1, 1, z], {z, 0, 2 Pi}]Please visit the official Wolfram Language Reference for more details.