I don't know if the formula will be given or not, but this is a simple formula. Just understand it, don't try to mug it up.
I have already finished A-Level maths(C1-4, M1-2), with an A*
, now i am doing further maths, so C2 is simple for me. I don't work too much, A-Level maths isn't hard. Just go through the chapters in the book and you will be fine with it. Try to understand things, do you use a book?