Bug#604032: gcalctool: incorrect results of tanh

[Jaromír Karmazín]

Package: gcalctool
Version: 5.30.2-1
Severity: normal

gcalctool provides wrong results for the hyperbolic tangent function (tanh).
Given the following input:
  tanh 0,1
the following is displayed:
  0,549833997
while the correct answer should be:
  0,099667995
(as calculated on a TI-30Xa calculator and confirmed by other engines).
Oddly, the inverse hyperbolic tangent of 0,099667995 yields 0,1 as expected,
while the same for 0,549833997 yields 0,618143348.
Note that the comma ',' serves as the decimal point in my locale and causes
no problems otherwise.

-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-5-amd64 (SMP w/4 CPU cores)
Locale: LANG=cs_CZ.UTF-8, LC_CTYPE=cs_CZ.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages gcalctool depends on:
ii  gconf2                      2.28.1-6     GNOME configuration database syste
ii  libatk1.0-0                 1.30.0-1     The ATK accessibility toolkit
ii  libc6                       2.11.2-7     Embedded GNU C Library: Shared lib
ii  libgconf2-4                 2.28.1-6     GNOME configuration database syste
ii  libglib2.0-0                2.24.2-1     The GLib library of C routines
ii  libgtk2.0-0                 2.20.1-2     The GTK+ graphical user interface 
ii  libpango1.0-0               1.28.3-1     Layout and rendering of internatio
ii  libxml2                     2.7.8.dfsg-1 GNOME XML library

Versions of packages gcalctool recommends:
ii  gnome-icon-theme         2.30.3-2        GNOME Desktop icon theme
ii  gvfs                     1.6.4-2         userspace virtual filesystem - ser
ii  yelp                     2.30.1+webkit-1 Help browser for GNOME

gcalctool suggests no packages.

-- no debconf information