- #1

ahmed markhoos

- 49

- 2

I'm trying this summer to finish my mathematical methods book. I'm investigating right now the chapter of complex numbers, the end of the chapter has some applications in electricity and how can complex numbers make the work easier.

The problem is that I didn't found it easier nor reasonable.

I have two main questions. First the book says, instead of writing [tex] I = I_0 sin(wt) [/tex] we can write it as [tex] I = I_0 e^{iwt} [/tex] but we know that [tex] e^{iwt} = cos(wt)+isin(wt) [/tex], so how the imaginary number and cosine disappear?

Second, how that can be helpful for solving problems? any examples?