If r(t)=⟨cost,sint,t⟩\mathbf{r}(t) = \langle \cos t, \sin t, t \rangler(t)=⟨cost,sint,t⟩, find the arc length from t=0t=0t=0 to t=2πt=2\pit=2π.
2π2\pi2π
22π2\sqrt{2}\pi22π
2π\sqrt{2}\pi2π
4π4\pi4π