Maeckes logo

<    1      2      3    >

Principle value (of an argument)

The complex argument of a complex number z in the interval [0, 2π) is called the principle value. The interval (−π, π] can also be taken.



You write a complex number z in phasor notation as

Where |z| is a positive real number, and you call this the modulus of z. The complex argument θ (theta) is a real number that specifies the angle with the real x-axis.


Example 1

The principle value of angle θ is calculated with arg (z) as

via the rectangular coordinates (−1, −1) and (0, 1).


Deutsch   Español   Français   Nederlands   中文   Русский