complex number calculations

Discussion in 'Math' started by suzuki, Apr 16, 2012.

  1. suzuki

    Thread Starter Member

    Aug 10, 2011
    119
    0
    Hi, its been a while since i've dealt with complex numbers, so i'd like to see if anybody has some help for this problem.

    say we have some complex number/expression denoted by A. (could be anything). The magnitude of A could be easily computed by

    ||A|| = sqrt(AA^*)

    the problem is, i want to know how i can calculate the phase. eventually, i would like to write in the phasor form, so i would need to extract the phase somehow.

    any simple solutions?

    thanks
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Say A=a+j*b

    Mag(A)=\sqrt{a^{2}+b^{2}}

    Phase(A)=arctan(\frac{b}{a})
     
    suzuki likes this.
  3. Papabravo

    Expert

    Feb 24, 2006
    10,140
    1,789
    On a modern calculator the "arctan" function is often represented as the inverse tangent or

    tan^{-1}(b /a)
     
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