NAME
    arg - argument (the angle) of a complex number

SYNOPSIS
    arg(x [,acc])

TYPES
    x		real, complex
    acc		real

    return	real

DESCRIPTION
    Return the angle of the complex value of x with the accuracy of acc.
    By default, acc is epsilon().

EXAMPLE
    > print arg(2+3i), arg(2-2i), arg(2)
    ~.98279372324732906798 ~-.78539816339744830961 0

    > print arg(sqrt(3)+1i), arg(sqrt(3)+1i, 0.001)
    ~.52359877559829887307 .5235996246337890625

LIMITS
    acc > 0

LIBRARY
    none

SEE ALSO
    conj, im, polar, re
