I dunno what bleakarcher and soloooooo are on about, name one time that probability was used in MATH1131... it's a 1231 topic yeah, not 1131.
Binomial theorem is used in a really limited way, it's at most going to be used in maybe 3/100 marks in the final exam, and it won't be a question on its own, it'll be a de moivres theorem expansion or something.
Circle geometry, again, it's really basic, nowhere near as hard and no dedicated questions. The hardest shit you'll need to remember is literally x^2+y^2=r^2 and polar coordinates i.e x=rcos(θ) and y=rsin(θ) and then easy trig identities from 2 unit. Recognising a polar graph and relating it to the equation of the graph is in there as well.
Double angle formule and stuff like that probably wont come up in MATH1131, I definitely remember using them in 1231 in some small way, but not 1131.
MATH1131 is a relatively easy course for someone who did 3u and/or 4u maths to pass. Don't freak out man, the course notes are really good for first year maths as well.