I need your help math geniouses.
Show that the involute of the catenary parameterized by arc length is a reparametrization of tractrix. (use the change of parameter 1/cosh(t)=sin(r))
The involute of the catenary (with arc lenght param.) gave me the following result:
when I use the change of parameter s = sinh(t) I have this:
I dont know how to continue with what its proposed 1/cosh(t)=sin(r) or if everything I did is worong . Please guide me on the path of certainty!!!