Solución

r(s)=(1+s2)sen(ln(1+s2))i+(1+s2)cos[ln(1+s2)]j\bold{r}(s) = \bigg(1+\frac{s}{\sqrt{2}}\bigg)sen\bigg(ln(1+\frac{s}{\sqrt{2}})\bigg)\bold{i} + \bigg(1+\frac{s}{\sqrt{2}}\bigg)cos\bigg[ln\big(1+\frac{s}{\sqrt{2}})\bigg]\bold{j}