

There’s a reason kids in Spelling Bee competitions are allowed to ask for the language of origin of a word.
It can often give a hint that a certain sound is spelled an unusual way. The “Ch” of “Chemistry” comes through Greek where it’s spelled with their letter “chi”, which for reasons I won’t get into, looks like our X.
Kids in a spelling bee wouldn’t need to ask about “Chemistry”, of course, but there may be other examples where that would be useful.




There’s an argument to be made that a continuous function is better than a piecewise function when coming at things mathematically, so in that sense it’s at least somewhat interesting.
Sure, in computer science where discrete mathematics is king and the modulus operator is ubiquitous, a cosine representation is entirely unnecessary, but from a recreational mathematical angle, it’s a fun distraction.
And it’s not like cosine interpolations are useless in a broader sense. They’ve contributed much to computer graphics.