Practice and checking I suppose. I still sometimes make stupid mistakes, but not as frequently as I used to. Just make sure you check the obvious things what are easily to make mistakes on. Checking whether your answer is reasonable is quite useful also say if you work through a question and you end up with a distance of 100000000 miles for example you may be a bit suspicious you've made a mistake.
What do you think are the most difficult elements of this unit?
hard to say really. I remember a lot of people having trouble with domains and ranges of inverse trig functions. But I think it varies person to person.
What resources are people using to revise? I really hate the textbook so if anyone knows any good websites or youtube channels it would be much appreciated
What resources are people using to revise? I really hate the textbook so if anyone knows any good websites or youtube channels it would be much appreciated
I recommend using past papers and just doing as many question as possible before the exam. Focus on areas you are stuck on. Good luck.