A.\({i_3} = 2\cos \left( {{\omega _3}t + \frac{\pi }{2}} \right)\,\,\left( A \right)\).
B.\({i_2} = 2\cos \left( {{\omega _2}t - \frac{\pi }{4}} \right)\,\,\left( A \right)\).
C.\({i_4} = \sqrt 2 \cos \left( {{\omega _4}t - \frac{\pi }{6}} \right)\,\,\left( A \right)\).
D.\({i_1} = \sqrt 2 \cos \left( {{\omega _1}t - \frac{\pi }{6}} \right)\,\,\left( A \right)\).
