arg
The argument of a complex number.
Syntax

arg(z)

z
is a complex number

Description
If z
is a complex number, arg(z)
is the argument of z
, that is, the angle that z
makes in the counterclockwise direction from the positive real axis in the Argand diagram, normalised to (π, π]. By definition, arg(0)
is 0
.
Examples
arg(0)
0
arg(i)
1.57079632679 (=π/2)
arg(−1)
3.14159265359 (=π)
arg(arccosh(i))
1.05947111646