Learning from Redundant Optimization: The asin() Function Case Study

This is really a tale of 'Do your research before acting and know what your goal is,' as you'll end up saving yourself a lot of time.

No matter how hard I try to shelve that project, every once in a while I hear about something 'new' and then wonder 'can I shove this into the ray tracer and wring a few more seconds of speed out of it?'

I still can't escape PSRayTracing.

Nobody likes throwing away work they've done either, and there could be something here that is valuable for someone else.

This one is going to be a quick one as there wasn't anything new discovered. In fact, I feel quite dumb.