For the given position vectors r(t) compute the unit tangent vector T(t) for the given value of t . A) Let r(t) = (cos 2t, sin 2t). Then T(# )( -1 , 0 > B) Let r(t) = (t2, +3) Then T(5) = 2V 229 15V 229 229 229 C) Let r(t) = elite bj + tk Then T(3)= 1 i+ 0j+ 0.00124 k