Edexcel A2 C4 Mathematics June 2015 - Official Thread

Don't worry, it's a lot easier than you think; $3$ is just a constant - forget about it somewhat. It is simply a multiplication factor of the RHS integral. The only real calculations you need to worry about are:

$\displaystyle\int y \ dy$ and $\displaystyle\int \sec^2(x) dx$

If there is a coefficient to the angle variable then there is going to be some change, yes. But in this case there is nothing like that. The answer is not the one you have given.

I really don't know what to do - done papers and the sort but feel as though i should actually be doing some work the night before the exam rather than wasting time on TSR. Any suggestions?

I really don't know what to do - done papers and the sort but feel as though i should actually be doing some work the night before the exam rather than wasting time on TSR. Any suggestions?

Look over some small parts that you find difficult and then take your night off and watch a film or something. If you have done all the past papers, you have probably done enough.

Im doing both. But last night i was revising geography, and being on here helped as i was talking and revising to people on a live chat. i know mtahs is different from geography, but i felt more confident and relaxed doing it!!

I really don't know what to do - done papers and the sort but feel as though i should actually be doing some work the night before the exam rather than wasting time on TSR. Any suggestions?

can someone help on 4b how do i know what trig identity to use for the cartesian equation ???? https://5a302d29ff432793ce79475dd3dba997851918fc.googledrive.com/host/0B1ZiqBksUHNYNElsMEE2MDU0eWM/11%20Gold%201%20-%20C4%20Edexcel.pdf

You cant do it by parts, as i keep going in loops and circles haha. I think you do it by inspection? which is something i cant do, but will have another try

Does anyone know when you put the modulus bars wrapped around a function in- is it just when you integrate? And whether or not you can lose marks for putting in brackets instead?

Note that $1 - 2\sin^2(\alpha) \equiv \cos(2\alpha)$

Does this help?

Someone answer this, more interested in the whether you lose marks part, cheers.

do some gold papers? maybe have a looke at a replacement or withdrawn paper? IYGB? solomon?
tbh, you should get an early nights sleep, but I reckon you can still do one more paper or maybe 2 before sleeping early....

Obviously you can't do it by parts, straight away you can see that it won't work this way

What does everyone need to get an A approximately?
or are you all looking at A*s?

Someone answer this, more interested in the whether you lose marks part, cheers.

Does anyone know when you put the modulus bars wrapped around a function in- is it just when you integrate? And whether or not you can lose marks for putting in brackets instead?