#2059: Erroneous results in trigonometric functions for > double-precision
values
-------------------------------+--------------------------------------------
Reporter: daniel.is.fischer | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 6.8.1
Severity: normal | Resolution:
Keywords: | Difficulty: Unknown
Testcase: | Architecture: x86
Os: Linux |
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Changes (by igloo):
* difficulty: => Unknown
Old description:
> For large inputs, sin, cos and tan return the input value:
> {{{GHCi, version 6.8.1: http://www.haskell.org/ghc/ :? for help
> Loading package base ... linking ... done.
> Prelude> sin 1e20
> 1.0e20
> Prelude> cos 1e20
> 1.0e20
> Prelude> cos 1e19
> 1.0e19
> Prelude> cos 1e18
> 0.11965025504785125
> Prelude> tan 1e19
> 1.0e19}}}
New description:
For large inputs, sin, cos and tan return the input value:
{{{
GHCi, version 6.8.1: http://www.haskell.org/ghc/ :? for help
Loading package base ... linking ... done.
Prelude> sin 1e20
1.0e20
Prelude> cos 1e20
1.0e20
Prelude> cos 1e19
1.0e19
Prelude> cos 1e18
0.11965025504785125
Prelude> tan 1e19
1.0e19
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2059#comment:5>
GHC <http://www.haskell.org/ghc/>
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