One example might be where you need to divide two complex numbers - for
example you want to calculate (a+jb)/(c+jd); that requires some tedious
However if the complex numbers are expressed in polar form: (w @ angle
x) and (y @ angle z), the answer is simple: w/y @ angle(x-z)
The engineers amongst us will be very familiar with swapping between the
two forms and using whichever is the easier to manipulate in a
We often use the polar form without realising it; for example a
resistance of 40 ohms in series with a reactance of 30 ohms gives a
total impedance of 50 ohms. We've unwittingly moved from the 40+j30
form to the 50@angle37degrees polar form.
> Thanks Steve. The series and parallel forms of notation are very intuitive;
> easy to visualize. Can you enlighten me/us on the advantages of using
> polar notation?
> There has to be a good reason for using it, right?
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