K 10
svn:author
V 4
tijl
K 8
svn:date
V 27
2015-06-15T20:40:44.962044Z
K 7
svn:log
V 243
- Change comments to be more consistent with s_ccosh.c and s_csinh.c.
- Fix a case where NaNs were not mixed correctly and signalling NaNs were
  not converted to quiet NaNs.
- Eliminate two negations from ctan(z).

In collaboration with:	bde

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