"verse"

I can use "verse" as a verb, reanalyzing "versus" as "verses". e.g.,

"I versed the computer when I played the game".

You don't hear that very often.

However, there is the "versed sine" [versin(x) = 1 - cos(x)], so I guess "verse" must be a verb in this case?

That usage isn't part of my speech; in fact I was unaware of it until I read about it a few months ago.

It's common amongst users of 1337speak.

<<However, there is the "versed sine" [versin(x) = 1 - cos(x)], so I guess "verse" must be a verb in this case? >>

Does "versed" here have any relation to "being well versed" in something?

That would link it to the noun "verse" as in 'Bible verse' etc