What are some practical uses for complex numbers?

[avery]

hi,

I am looking for any example (complete calculus) using Complex Numbers to solve real problems.

is the right approach:

1- starting with real variables
2- adding the imagine part
3- calculation...
4- extracting only the real value from the result.

?

thx.

 

[LCKurtz]

A standard application of complex numbers is in electrical circuits with the notion of impedance. There are tons of places to read about that on the internet. Try Google, or you might start with

http://en.wikipedia.org/wiki/Electrical_impedance