Attention: with the new firmware, in a physical calculator, running RPN, the key assign will not work unless you spell the key stroke with small caps after the first letter: Sin(), Cos(), Tan(). For some reason, full caps is not recognized. It is the same thing that happens with the IRR formulae, that we will review tomorrow.
This did not happen with the original firmware, since it was well tested in the original form; and, for some reason, it does not happen either in the emulator screen (and therefore, a copied program will not work. Remember we're talking only about RPN. I have not tested everything in other data entry formats, but the things I tried, worked perfectly in any form - it is not as picky as RPN.