Hey there - I don't really have anything to link you but from my experience with 2u maths, with trig and log functions, there's no easy way around it - you just have to memorise those formulas. To make things easier, you'll be able to memorise them a lot easier through past papers. I found that I increased my marks by a LOT after doing a couple of past papers. They're only 3 hours long - so if you do one per week (under exam conditions) and mark them, I think by the time HSC comes around, you'll smash 2 unit. So to answer your question, I just memorised my formula, but once you practice them heaps, they'll just be imprinted in your brain anyway! You could probably find some great formula sheets on google or this forum!
Best of luck with everything!
