Antisine, anticosine

A lot of math terminology is inefficient, and that’s being generous. One could also call it incoherent.

But I talk too much about that. Here’s a specific change I’d like to see: antisine x, rather than  or 

It just makes sense, because antisine is defined as the inverse function of sine, so that they annihilate with each other like antiparticles: 

This can (and should) be generalized to the inverse of any mathematical function.