calc

stupid thing:

:o w*f is wrong with this calculator inverse of cos is WRONG ALL THE THINGS I HAVE PUT IN ARE VALID NOT INVALID PEICE OF $%#@&!!!!

There have been some recent upgrades so maybe you have found a bug, but i just checked one inverse cos and it worked fine.
What calculation were you trying to do. I would like to see for myself.
Thank you
Melody.