This it an elaboration of Problem 14. Assume U is a unit vector. In what direction u docs the function f(x.y) = sin (3r - y) increase most rapidly at the point (pi /6, pi/4)? Assume u is a unit vector. u = . In what direction V (again, a unit vector) docs the same function increase most rapidly at the point ( 0.pi)? v = . Solution 3/4.