If the rms phasor of a voltage is given by \(\mathrm{V}=120 / 60^{\circ}\) volts, then the corresponding \(v(t)\) is given by

(a) \(120 \sqrt{2} \cos \left(\omega t+60^{\circ}ight)\)

(b) \(120 \cos \left(\omega t+60^{\circ}ight)\)

(c) \(120 \sqrt{2} \sin \left(\omega r+60^{\circ}ight)\)