4u math

If anyone else did the CSSA 2025 4u paper, what mark did you get? I found most of the proofs difficult along with the vector q in 14 and projectile in 16. I got 82/100 so would that be around the e4 range for the actual hsc based on its relative difficulty compared to previous hscs?

Hello Board of Studies Users, I just want to know a simple question: If you do math extension 2 (4 units), are the internal assessments for math advanced used for your HSC Marks, or is it that Maths Advanced does not count to the HSC at all? I am asking this because I have seen some sources...

How do i prove this, also am i able to assume that coeff friction ≥0?