1. [-/1 Points] DETAILS LARCALC11 12.4.005. Find the unit tangent vector to the curve at the specified value of the parameter. r(t) = 3 cos(t)i + 3 sin(t)j, t = 4 Need Help? Read It 2. [-/1 Points] DETAILS LARCALC11 12.4.004. Find the unit tangent vector to the curve at the specified value of the parameter. r(t) = ti + 6t2j, t = 1 T(1) =. [/2 Points] DETAILS LARCALC11 12.4.010. MY NOTES ASK YOUR TEACHER Find the unit tangent vector T(t). r(t) = tZi + tj + g k, P(1, 1, 4/3) T(1) = Find a set of parametric equations for the line tangent to the space curve at point P. (Enter your answers as a comma-separated list. Use 1' for the variable of parameterization.) \fFind its length over the given interval. 4