Ok, so i need to calculate the equation of the evolute for the catenary(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\gamma(t)= (t,cosh(t))[/tex].

I'm not really sure how to do this, the definition of evolute I have requires a unit-speed parametrization, but it looks a little difficult to find that also (the arclength if i'm correct is given by

[tex]s(t)=\frac{1}{2}(sin(2t)+t)[/tex]).

Is there some "standard" way of finding the evolute?

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# Equation of evolute?

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