Question

Ok, so e^(ix)=cos x+i sin x
One can use vectors to describe AC sinusoidal waves.
Apparently imaginary numbers have to do with this. I don't understand.

Answer 1

@amistre64 ?

Answer 2

@saifoo.khan ?

Answer 3

Yes, this is more of a physics question, but nobody ever goes there.

Answer 4

there are a few ways to draw the graphs of sinusoidal functions; polar and rectangular

4sin(t) for example