A three-phase △-connected generator is driving a balanced load such that each phase current is 12 A in magnitude. When I θa = 12 ∠30° A, what are the polar expressions for the other phase currents?

• I θb = 12 ∠150° A, I θc = 12∠–90° A
• I θb = 12∠120° A, I θc = 12∠30° A
• I θb = 12∠30° A, I θc = 12∠120° A
• I θb = 12∠90° A, I θc = 12∠90° A