plots[implicitplot](tan(x*sqrt(cp^2/3220^2-1))*(cp^2/3220^2-2)^2+4*tan(x*sqrt(cp^2/6450^2-1))*sqrt((cp^2/3220^2-1)*(cp^2/6450^2-1)) = 0, x = 0 .. 14, cp = 0 .. 7000, gridrefine = 7, signchange = false),
the command above can't give me the whole figure, it lost some points in [0,3.5(approximation)],
can someone help me,
thank you very much
