result of cos is never more precise than double

4 results were exact to double the precision

20 largest ulp errors (stored in a double)
   8913667029669242.00000 ulp for cos(1426668733016935.5) = 0)
   8913667029669235.00000 ulp for cos(1426668733016935) = 0)
   8636562708039153.00000 ulp for cos(3067449762708522) = 0)
   8636562708039151.00000 ulp for cos(3067449762708523) = 0)
   2272904.90286 ulp for cos(13932548566.648438) = -5.4449081300488548e-15)
   1.49989 ulp for cos(382.51684471996884) = 0.72658420587522454)
   1.12787 ulp for cos(82853532.499998301) = 1.6944049853803394e-06)
   1.02722 ulp for cos(20035964.24994814) = -5.1863459433342256e-05)
   0.99655 ulp for cos(10526671570.499811) = -0.00018882751440299408)
   0.94503 ulp for cos(2709675.5000000373) = -5.635314052006741e-08)
   0.92967 ulp for cos(1860674085.8750031) = -3.0994600259292162e-06)
   0.87713 ulp for cos(20035964.249982465) = -1.753863464566556e-05)
   0.82096 ulp for cos(13932548566.669859) = -0.021419794229515159)
   0.79635 ulp for cos(2709675.4999946137) = 5.3672038727274036e-06)
   0.77642 ulp for cos(637372944.75108087) = 0.0010808705297590943)
   0.75200 ulp for cos(13932548566.668327) = -0.019888520148124242)
   0.75039 ulp for cos(1.0471975511965896) = 0.50000000000000711)
   0.70005 ulp for cos(6430593.5468750196) = 1.9597410255236982e-08)
   0.67255 ulp for cos(1.0471975511965979) = 0.49999999999999994)
   0.66369 ulp for cos(0.11600748179999969) = 0.99327867497607158)

<tr><td align=left><a href=cos.res>cos</a></td><td align=right>1418</td><td align=right>8913667029669242.00000</td><td>1426668733016935.5</td><td>0</td></tr>