What is the angle (in degrees) between u=⟨1,0,0⟩\mathbf{u} = \langle 1, 0, 0 \rangleu=⟨1,0,0⟩ and v=⟨1,1,0⟩\mathbf{v} = \langle 1, 1, 0 \ranglev=⟨1,1,0⟩?
30°30°30°
45°45°45°
60°60°60°
90°90°90°