Complex argument of a symbolic expression
I was wondering how could I get the argument of an expression involving complex numbers. For example, this simple case fails at first:
sage: z = i + 1.0 sage: z.argument() Traceback (most recent call last): ... AttributeError: 'sage.symbolic.expression.Expression' object has no attribute 'argument'
sage: i = CC.0 sage: z = i + 1.0 sage: z.argument() * 180 / pi.n() 45.0000000000000
As you can see in this worksheet.
Of course, if the expression involves symbolic variables and such the same problem appears. Is there any direct way I can calculate the complex argument of a symbolic expression?
I mean, apart from
atan(z.imag() / z.real())