Neither do I . Better to use the brains for more important things then what you can easily found written somewhere. About advanced formulae I was talking about some complicated functions that would incorporate all the glitches and harmonics of the mains electricity. Yes someone did mention a Sine function. I thought it was strange because my analysis gives me a Cosine . But well who cares, you can relate the two with some trigonometry. About my initial assumption: As I said in a previous post this guy has been prodding me so in a way I was teasing him ... I was hoping he'd say "Multiply 2 sinusoids (Current and Voltage) together and you get a function that is never negative and the average of that is never zero." Well then I'd have taken him on another level like "you forgot to include phase differences ... which are important in real loads , because if you do that you get another sinusoidal function " and so on.
About the whisky ... Alcohol caused me some grief so I just want people to avoid any unnecessary pain in their lives.
"Go easy with the whisky"
theJackal