Answer / pradyumna chandra panda

Current leg or lead behind or ahead the voltage from maximum value ( from 90°) of alternative Qnty is called legging or leading power factor which is equal to rest valve ( 90° - legg / + lead) of sine ie. legging 36° of cose value ( .8 ) is equal to rest value of sine 54° (90°-36°) ie .8 Therfore we indirectly use sine value by appling cose value. Is this correct ? plz give your openion.

Answer / sarmadahmed

SINE and COSINE are both sinusoidal. They essentially have same properties but different values at different time but both are sinusoids and every wave having similar properties will be a sinusoid too. And the cosine term is there because of some trigonometric calculations, it could be sine too. Have a look at power triangle and you'll get the answer.

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