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From: Chris Angelico <rosuav@gmail.com>
Newsgroups: comp.lang.python
Subject: Re: sympy
Date: Fri, 1 Apr 2016 04:05:01 +1100
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On Fri, Apr 1, 2016 at 1:55 AM, Peter Otten <__peter__@web.de> wrote:
> Hm, the two functions fmsympy() and fm() do not return the same value:
>
> $ python -i sympy_diff.py
> 10000  evaluations with sympy   : dt1 = 0.7178411483764648
> 10000  evaluations without sympy: dt2 = 0.10177111625671387
>>>> fm(42)
> cos(42)
>>>> fmsympy(42)
> -0.399985314988351
>

Maybe not, but that's simply because one of them is completely
evaluated. The cosine of 42 radians is indeed -0.4ish.

>>> math.cos(42)
-0.39998531498835127

ChrisA