It sounds like you are currently a senior and have already applied to colleges. I’m not sure what advice you are looking for. My advice is to not worry about things that you cannot change. ED results will be out soon and then you will know.
I don’t think taking precalc senior year will cause a rejection, but people get rejected anyway for lots of reasons. If you are rejected there is no way to know if it was because of your math track. Just make sure you have applied to safeties.