Maybe a library of trig functions that include an Angle type? This is related to the timespan units discussion we just had

def sin(angle):

On 2018-06-08 01:44, Yuval Greenfield wrote:
On Thu, Jun 7, 2018 at 10:38 PM Stephen J. Turnbull <> wrote:


is good enough for government work, including at the local public high

There probably is room for a library like "fractions" that represents multiples of pi or degrees precisely. I'm not sure how complicated or valuable of an endeavor that would be. But while I agree that floating point is good enough, we probably can do better.

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