In a similar vein:
As those who have been reading all of the posts may recall, I too an one of those poor old souls who couldn't find what was right in front of me in a doc.
Old age and "senior moments" are inevitable, and so it just makes me more determined to look harder for what I need the next time. However, last week I did look carefully through the index of Manual 2 looking for the math functions. Couldn't find them, so I manually searched through every page in my copy of the manual until I finally found them. They were under the "Let" command.
I can now see why they would be associated with "Let," but I sure wouldn't have known it would be so until after I'd spent 15 minutes searching for them.
As they are not actually commands, they logically aren't listed in the index. However, It would be nice if their presence were noted alongside the Let command in the index for those of us working from a printed copy of the manual.
BTW, being of fading intellect, and as I was indeed looking through a printed version of Manual 2, it never occurred to me to just get on the PC, load Manual 2, and use the PDF search function, at least not until I'd already found the commands the old fashioned way. Habits of a lifetime are hard to break.