Hey Benjamin!
I 100% agree with the above,
These are my experiences with the math sides of things of my science degree.
I have to do mandatory (but elective) units to do with maths, like "Statistical Concepts for Science" or "Introductory Statistics", and currently I am completing a unit called, "Mathematical Concepts for Science". In this unit, the extent/ hardest thing we have to learn is Calculus (Just the beginning of it), like derivatives, optimisation, the second derivative, etc.
!But the thing with these units is that you can choose what exactly you want to study. For Example, say you want to study just statistics, then you can choose statistic units, or if you want a general but specific overview of scientific math, then you can choose maths concepts for science.
Then again, I am majoring in Biology, so the maths is not as heavy as a major in Physics, but is equally important
I did the HSC Advanced Maths course, not VCE so I can't really comment on if you need methods for this degree, but I know that the Advanced Maths is actually helping me with this unit.
I hope this helps!
Coolmate