[issue31630] math.tan has poor accuracy near pi/2 on OpenBSD and NetBSD
Stefan Krah
report at bugs.python.org
Sat Nov 18 08:36:32 EST 2017
Stefan Krah <stefan at bytereef.org> added the comment:
I found an unused i386 box with OpenBSD and Linux (so no VM):
A C program with tan(1.5707963267948961) is wrong on both systems.
fdlibm (directly from netlib.org) is correct on both systems.
Both OS versions are relatively old, so I cannot file an upstream issue.
I was planning to dig through the fdlibm code if there was an issue,
but it produces the correct results.
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<https://bugs.python.org/issue31630>
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