not sure if this answer is correct, please try,thank you.

For the smooth curve r(t), find the parametric equations for the line that is tangent to r at the given parameter value t = to. r(t) = (5 tan t) i - (3 sin t) j + (4 cos 2 t) k ; to= 4 O x = 10 + 5ty= 31/2 31/2 2 2 t, z= -4 + 2t O x = 5 + 10t, y= 2 2 t, z = 2 + 4t O x = 5 + 10t, y = > 2 5t, z = 4 -4t O 31/2 31/2 x = 5 + 10t, y = 2 2 t, z = 2 - 4t