Solución

aT=6t+12t31+t4+t2,aN=61+4t2+t41+t2+t4a_{\bold{T}} = \frac{6t+12t^3}{\sqrt{1+t^4+t^2}}, a_{\bold{N}} = 6\sqrt{\frac{1+4t^2+t^4}{1+t^2+t^4}}