Use spherical coordinates to find the limit. Let x = p sin o cos 0, y = sin sin , y =

Use spherical coordinates to find the limit. Let x = p sin o cos 0, y = ρ sin Ø sin θ, y = ρ sin Ø sin θ, and z = ρ cos Ø and note that (x, y, z) → (0, 0, 0) implies ρ → 0+.

lim (x, y, z)(0, 0, 0) tan-1 1 _x + y + z