Fix for bug [ 1370433 ] trigsimp(sqrt(%i2)) !=sqrt(trigsimp(%i2))?

>>>>> "Robert" == Robert Dodier <robert.dodier at gmail.com> writes:

    Robert> On 11/10/06, Andrey G. Grozin <A.G.Grozin at inp.nsk.su> wrote:
    >> > (%i2) sqrt(x^2);
    >> > (%o2) abs(x)
    >> But this is wrong! maxima should stop doing this. For example, for
    >> x = 1 + %i
    >> with the standard cut along the negative real half-axis,
    >> sqrt(x^2) = 1 + %i = x
    >> but
    >> abs(x) = sqrt(2)

    Robert> Here Maxima is making an unstated assumption that symbols
    Robert> represent real variables unless declared complex.
    Robert> (declare(y, complex), sqrt(y^2)) => sqrt(y^2)
    Robert> I don't know if that policy is followed 100%.

This is also controlled by the domain variable.  The default is real,
so sqrt(x^2) -> abs(x).  If the domain is complex, sqrt(x^2) remains.

Ray