Bug#35291: sin(pi) is not zero ?

[Halldór Olafsson <halldor@ic.chalmers.se>]

Package: drgenius
Severity: normal
Version: 0.51
Synopsis: sin(pi) is not zero ?
Class: sw-bug

Distribution: Debian woody
System: Linux 2.2.13 i686 unknown
C library: C library 2.2-4
C compiler: 2.95.2
glib: 1.2.8
GTK+: 1.2.8
ORBit: ORBit 0.5.4
gnome-libs: gnome-libs 1.2.8
libxml: 2.1.0
gnome-print: gnome-print-0.25
gnome-core: gnome-core 1.2.4


Description:

 I just downloaded and compiled Dr. Genius 0.51. In the Genius shell I
write : 

  genius> pi  
=
3.141592653589793238462643383279502884197169399375105820974944592307816406...
genius> sin(pi)
=
1.997915744120600419549473358607454228998467230590789927080586197919866271...
genius> 

   I was expecting a zero. Note that cos(pi) is minus one, like it's
supposed to, but cos(pi/2) seems
  to have the same problem as sin(pi) : 

genius> cos(pi/2)
=
9.975597129223625247887874178446362227615037021371172946917454642392707602...
genius> 

   Halldór