<P> In mathematics, arg is a function operating on complex numbers (visualized in a complex plane). It gives the angle between the positive real axis to the line joining the point to the origin, shown as φ in figure 1, known as an argument of the point . </P> <P> An argument of the complex number z = x + iy, denoted arg (z), is defined in two equivalent ways: </P>

What is an argument of a complex number
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