Edexcel AS Mathematics C2- 25th May 2016 Thread

Maybe you find it easy, good for you. I find it difficult because I'm trying to memorise the formula without having to refer to the formula sheet. I hate referring to it in the exams unless absolutely necessary. The word "difficult" has multiple synonyms in the thesaurus, it could mean inconvenience just as well.

So, do you think it'd best to do Solomon papers over past papers?

It's been said before multiple times, the best revision for any of the core modules are papers from www.madasmaths.com

I'm doing aqa? Like is there a difference, like is edexcel harder than aqa? Or the other way round, because I seem to be the only person doing the aqa as new spec 😂😂

Can someone please explain part b.

The mark scheme did this:
sinx=2cosx
sinx/cosx=2cosx/cosx
tanx=2
x=63.4, 243,4

I got these but I also got 90 and 270 because I did:
Sinx=2cosx
cosxtanx=2cosx
cosxtanx-2cos=0
cosx(tanx-2)=0
cosx=0 Tanx=2
So I got 90 and 270 as well

That's not correct because your solutions are solutions to $\cos x = 0$ which isn't valid in the identity you've used.

Im not sure what you mean. Is it because sinx/cosx=tan and because cosx=0 then the fraction is not possible?

If so I get it now. But would my method still be OK as long as I state that at the end?

ok so basically i haven't really started much revision, i pretty much know how to do binomial expansion polynomial division integration and trapezium ruled. I just need to work on trig identities, geometric sequences, radian sectors and stationary points how should i revise it books or papers and exam solution's. i have two days to revise

Papers. Examsolutions for anything you don't understand from the papers. And then back to papers.

Will that be enough?

Yes. Just try to never write sin x = tan x cos x, it's s urgh. There's a much better away, as can be seen in the markscheme.



It'd be okay if you stated that and quite explicitly mentioned that you were rejecting 90 and 270 as solutions.

Yeah. Just make sure you understand what's going on.

How likely do you guys think it is that sigma notation will come up? I can do standard geometric sequences questions but for some reason that always throws me.

What kind of things throw you? There is time to learn them is it when r is not equal to 1?

How likely do you guys think it is that sigma notation will come up? I can do standard geometric sequences questions but for some reason that always throws me.