[Bug 1156579] [NEW] sin() and tan() have different values during compile time and run time.

[Sergii Strelkovskyi]

Public bug reported:

Sources with test cases are attached.
Current output:
Compile-time value of sine is -2.44929359829470641e-16
Runtime value of sine is -2.44921270764475452e-16

Compile-time value of tangent is -1.63312393531953700e+16
Runtime value of tangent is -1.63317787283838440e+16

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: libc6 2.15-0ubuntu20
ProcVersionSignature: Ubuntu 3.5.0-25.39-generic 3.5.7.4
Uname: Linux 3.5.0-25-generic i686
ApportVersion: 2.6.1-0ubuntu10
Architecture: i386
Date: Mon Mar 18 13:54:58 2013
InstallationDate: Installed on 2012-06-09 (281 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: eglibc
UpgradeStatus: Upgraded to quantal on 2013-01-09 (67 days ago)

** Affects: eglibc (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 quantal

** Attachment added: "Source code with sine test"
   https://bugs.launchpad.net/bugs/1156579/+attachment/3581277/+files/sine.c

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https://bugs.launchpad.net/bugs/1156579

Title:
   sin() and tan() have different values during compile time and run
  time.

Status in “eglibc” package in Ubuntu:
  New

Bug description:
  Sources with test cases are attached.
  Current output:
  Compile-time value of sine is -2.44929359829470641e-16
  Runtime value of sine is -2.44921270764475452e-16

  Compile-time value of tangent is -1.63312393531953700e+16
  Runtime value of tangent is -1.63317787283838440e+16

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: libc6 2.15-0ubuntu20
  ProcVersionSignature: Ubuntu 3.5.0-25.39-generic 3.5.7.4
  Uname: Linux 3.5.0-25-generic i686
  ApportVersion: 2.6.1-0ubuntu10
  Architecture: i386
  Date: Mon Mar 18 13:54:58 2013
  InstallationDate: Installed on 2012-06-09 (281 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: eglibc
  UpgradeStatus: Upgraded to quantal on 2013-01-09 (67 days ago)

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