Oscillating Circle 2

f(x) = (3 * cos(x))
g(x) = (3 * sin(x))
a = CurveCartesian(f(t), g(t), t, 0, (2 * pi))
v = 0 (slider from 0 to (2 * pi))
u = Vector(a(v), a(v) + UnitVector[a'(v)])
P: a(v)
c = OsculatingCircle(P, a)
h(x) = abs((f'(x) * g''(x)) - (g'(x) * f''(x))) / ((f'(x))^(2) + (g'(x))^(2))^(3 / 2)
A: (v, h(v))