TRIGEXPAND FUNCTION

[G. Cook]

Thanks to all for the help. I reset both the calculator and the emulator and now all works. It works whether I use the SIN key, or type in SIN or sin but only displays the result in caps. I notice it also works with fractional inputs but not decimal i.e. sin(3/2*x) works but not sin(1.5*x). I guess that is normal for CAS.