On Mon, Jun 12, 2017 at 2:03 PM, Bradley Lucier <xxxxxx@math.purdue.edu> wrote:

Upon successful completion, these functions shall return the arc tangent of y/ x in the range [π-,π] radians, using the signs of y and x to choose the correct quadrant for the result.

Adopted, with adjustments for the Scheme context.

-- 
John Cowan          http://vrici.lojban.org/~cowan        xxxxxx@ccil.org
When I wrote it I was more than a little febrile with foodpoisoning
from an antique carrot that I foolishly ate out of an illjudged faith
in the benignancy of vegetables.  --And Rosta