The curves f($) : :32 + 2.11: + 4 and 9(3) : a: | 2 intersect at the point ( 2, 4). Find the acute angle of intersection in degrees. 0 9:. Let r(t) = ( - 3t* + 3, 3e , - 2 sin(t)) Find the unit tangent vector T (t) at the point t = 0. Round to 4 decimal places. T(0) =