The voltage across an element is v1t 30 cosomega t 30 degr

The voltage across an element is v_1(t) = 30 cos(omega t + 30 degree). The current through that element, i_1(t), has an rms value of 15 A and lags v_1(t) by 50 degree. What is the phasor diagram for V_1 and I_1?

Answer is option e . Because, in phasors the quantity is represented by magnitude and phasor.When coming to magnitude it represents maxmium value here in all he options they have given only rms values.So, answer is option e.