if u search up 'HSC textbook library reddit' and click on the first result, there's a giant google drive file full of every yr 11 and 12 textbook in existence, probably guaranteed to be on there in the standard maths section
if u search up 'HSC textbook library reddit' and click on the first result, there's a giant google drive file full of every yr 11 and 12 textbook in existence, probably guaranteed to be on there in the standard maths section