Results are out! Find what you need...fast. Get quick advice or join the chat
Hey there Sign in to join this conversationNew here? Join for free

C3 Jan 11 Edexcel - Solutions and Paper in the first post (Now On) + TIPS

Announcements Posted on
    • Thread Starter
    • 493 followers
    Offline

    ReputationRep:
    Sorry for starting a new thread on C3 but I will edit this post to include the paper and solutions 12:00 Tuesday, if I am awake and if the thread is unlocked.... this way the solutions will be easily to find.

    Here is a link to the current C3 discussion

    http://www.thestudentroom.co.uk/show....php?t=1503521

    Here is a link to the C3 June 10 thread on the post where I uploaded the solutions, there was some good discussion and useful tips in the pages before it.

    http://www.thestudentroom.co.uk/show...&postcount=370

    I attached the specimen paper to that thread before the exam, well worth doing as it is fairly challenging.

    Here are the grade boundaries to the previous C3 papers

    Module Session 100ums 90ums 80 (A) 70 (B) 60 (C) 50 (D) 40 (E)
    C3 Jun-09 75 71 67 59 52 45 38
    C3 Jan-08 75 70 64 56 49 42 35
    C3 Jun-08 75 70 64 57 50 43 37
    C3 Jun-10 75 69 62 55 48 41 34
    C3 Jun-05 75 68 61 53 46 39 32
    C3 Jan-06 75 68 61 53 46 39 32
    C3 Jan-09 75 68 60 52 44 36 29
    C3 Jun-07 73 66 59 52 45 39 33
    C3 Jan-10 73 66 59 52 45 39 33
    C3 Jan-07 74 66 58 50 42 34 27
    C3 Jun-06 70 63 56 49 43 37 31


    I will put some tips up and answer some pre-exam questions in this thread.
    • 99 followers
    Offline

    ReputationRep:
    Discuss all your enquiries and queries leading up to the exam How are people preparing? Good luck
    • 99 followers
    Offline

    ReputationRep:
    Mod, made a mistake in title, could you change it to 24 please thanks
    • 20 followers
    Offline

    ReputationRep:
    RIP YH and Rahu
    • 9 followers
    Offline

    ReputationRep:
    • 4 followers
    Offline

    ReputationRep:
    In iteration, once we have two consecutive results to the appropriate degree of accuracy, can we stop there, or should we carry on to see if there is greater convergence?
    • 1 follower
    Offline

    ReputationRep:
    (Original post by ViralRiver)
    In iteration, once we have two consecutive results to the appropriate degree of accuracy, can we stop there, or should we carry on to see if there is greater convergence?
    I just look at what degree of accuracy the question asks for like 4 significant figures, for example. Then i just keep pressing equals on the calculator until the numbers on the calculator relevant to 4sf don't change. Works for me, i guess.
    • 0 followers
    Offline

    ReputationRep:
    this is going to be my first ever resit. Hopefully I will improve on my last score
    • 19 followers
    Offline

    ReputationRep:
    (Original post by extricated)
    rip yh :e:e:e:e:e and rahu :e:e:e:e:e
    rip shu
    • 21 followers
    Offline

    ReputationRep:
    C3 exam is in a months time so I thought it would be good to discuss tips and exam practice? Who has finished their exam revision? Also does anyone have old P2 and P3 exam papers from before 2000?
    • 11 followers
    Offline

    ReputationRep:
    Woooo, C3! Im not actually completely dreading this one. Just gonna plough through past papers :p:
    • 21 followers
    Offline

    ReputationRep:
    Yeah same here just exam papers. Have you done much revision for it?
    • 0 followers
    Offline

    ReputationRep:
    Yeah I dont tend to worry about 'revision' for maths, as it's basically just practicing on exam papers.
    So probably just going to work my way through papers from 2006 :P
    • 21 followers
    Offline

    ReputationRep:
    That was what I was planning to do but I didn't do good in C2 so I didn't want to make the same mistake again for C3 especially since C3 counts towards an A* I don't want to be resitting that.
    So I'm doing all the past papers.
    • 4 followers
    Offline

    ReputationRep:
    Not dreading this exam, but need at least 95/100 UMS to make the C4 exam less stressful! How about we collect some of the harder questions for extra practice? One I found in a recent paper is:

    If x=tany, show that \frac{dy}{dx}=\frac{1}{x^2+1}

    Made me think, but once you spot the trick it's simple. 5 marker there .
    • 21 followers
    Offline

    ReputationRep:
    (Original post by ViralRiver)
    Not dreading this exam, but need at least 95/100 UMS to make the C4 exam less stressful! How about we collect some of the harder questions for extra practice? One I found in a recent paper is:

    If x=tany, show that \frac{dy}{dx}=\frac{1}{x^2+1}

    Made me think, but once you spot the trick it's simple. 5 marker there .
    You're right it is actually simple just a bit of identities, it took me a long time to do this. This would be the question I'm bogged on for most of the exam.
    dx/dy=sec^2(y)
    dy/dx=1/sec^2(y)
    dy/dx=1/tan^2(y)+1
    dy/dx=1/x^2+1
    I need to get better at identities I only know cos^2+sin^2=1 and I convert from that.
    What year was that paper?
    • 4 followers
    Offline

    ReputationRep:
    (Original post by jam277)
    You're right it is actually simple just a bit of identities, it took me a long time to do this. This would be the question I'm bogged on for most of the exam.
    dx/dy=sec^2(y)
    dy/dx=1/sec^2(y)
    dy/dx=1/tan^2(y)+1
    dy/dx=1/x^2+1
    I need to get better at identities I only know cos^2+sin^2=1 and I convert from that.
    What year was that paper?
    Ahh you did it differently from me, I wouldn't have even thought of doing that. I did the following:

    dx/dy = sec^2y
    dy/dx=cos^2y

    Now, I drew a right angled triangle, angle y, adjacent 1, opposite x (tany = x/1). From that, the hypotenuse is \sqrt{x^2+1} from Pythagoras' Theorem.

    Hence: dy/dx=cosy\cdot cosy=(\frac{1}{\sqrt{x^2+1}})^2=  \frac{1}{x^2+1}, as required.
    • 59 followers
    Offline

    ReputationRep:
    I'm doing C3 and C4 in January and need to get an A* overall for myself and my universities as well! Would be a good idea to discuss a few difficult questions on here
    • 21 followers
    Offline

    ReputationRep:
    (Original post by sportycricketer)
    I'm doing C3 and C4 in January and need to get an A* overall for myself and my universities as well! Would be a good idea to discuss a few difficult questions on here
    Yeah get the hard questions infact solomon press ones if you can. I'll find some hard ones as well. Gonna aim for at least 94 so I beat my other modules.
    • 21 followers
    Offline

    ReputationRep:
    (Original post by ViralRiver)
    Ahh you did it differently from me, I wouldn't have even thought of doing that. I did the following:

    dx/dy = sec^2y
    dy/dx=cos^2y

    Now, I drew a right angled triangle, angle y, adjacent 1, opposite x (tany = x/1). From that, the hypotenuse is \sqrt{x^2+1} from Pythagoras' Theorem.

    Hence: dy/dx=cosy\cdot cosy=(\frac{1}{\sqrt{x^2+1}})^2=  \frac{1}{x^2+1}, as required.
    I never even knew you could do that my spatial awareness is not that good, probably why I flopped C2. Sometimes identities are so long to find so your way is generally foolproof.

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide to join now Processing…

Updated: June 19, 2011
New on TSR

What do you think of the BBC?

UK Parliament wants to hear your views

Article updates
Reputation gems:
You get these gems as you gain rep from other members for making good contributions and giving helpful advice.