Question: Given v ( t ) = c o s ( 2 0 t - 9 0 ) and i ( t ) = s i

Given v(t)=cos(20t-90) and i(t)=sin(20t-45), does v(t) lead or lag i(t)?
v(t) pick i(t)
The phase shift from v(t) to i(t) is: Ex: 120(degrees)
Given v ( t ) = c o s ( 2 0 t - 9 0 ) and i ( t )

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