Question: The voltage and current in a circuit are given by v 1 = 1 2 0 cos ( 1 2 0 t 4 0 )

The voltage and current in a circuit are given by
v1=120cos(120t40)V;i1=20cos(120t+20)Av1=120cos(120t40)V;i1=20cos(120t+20)A
Find the angle in degrees by which current i1i1lags voltage v1v1.

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