Ubuntu 17.10 (artful) reached end-of-life on July 19, 2018. I've tested using LibreOffice, an online site and the calculator in Ubuntu 18.04. I don't see any discrepancies.
If you're still seeing an issue in a supported release such as Ubuntu 18.04 or 18.10 it would be nice if you could send a bug report to the developers of the software by following the instructions at https://wiki.ubuntu.com/Bugs/Upstream/GNOME. When you have done so, please tell us the number of the upstream bug (or the link), so we can add a bugwatch that will inform us about its status. Thanks in advance. ** Changed in: gnome-calculator (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-calculator in Ubuntu. https://bugs.launchpad.net/bugs/1764409 Title: cosh and sinh issue To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-calculator/+bug/1764409/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs