日本戴尔官网:is there anybody knows the formula of Power Factor?

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urgent . . tq vmuch

PF
＝cosθ
＝(U dot I)/|UI|
＝cos[arg(ū/ī)]

where 'dot' means dot product of two vectors, and ū and ī are the equivalent complex value of voltage and current, respectively, and θ is the angle between the U and I vectors.

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