Turn on thread page Beta
    Offline

    3
    ReputationRep:
    I have only done the mock paper and it wasnt bad.

    But i have not done the specimen paper though.

    Anyone have it?
    • Thread Starter
    Offline

    2
    ReputationRep:
    http://www.edexcel.org.uk/VirtualCon...r_MkScheme.pdf
    Offline

    0
    ReputationRep:
    (Original post by goku999)
    I have only done the mock paper and it wasnt bad.

    But i have not done the specimen paper though.

    Anyone have it?
    http://www.edexcel.org.uk/VirtualCon...r_MkScheme.pdf
    Offline

    3
    ReputationRep:
    Thx, since there was no C3 exam in the past, i think the C3 exam 2 moro will be very similar to the mark scheme and the mock paper.
    hope it is going to be easy.
    • Thread Starter
    Offline

    2
    ReputationRep:
    Check out Edexcel's practice papers as well (they're abit harder).
    Offline

    0
    ReputationRep:
    hav u got a link for the mock n practice papers?
    • Thread Starter
    Offline

    2
    ReputationRep:
    See first post of this thread.
    Offline

    0
    ReputationRep:
    k ty
    Offline

    0
    ReputationRep:
    Given that y = lnsecx, -90 < x <= 0, use the substitution u = secx, or otherwsie, to show that dy/dx = tanx

    What I have I done wrong here, it seems simple enough unless I've made a massive error I haven't noticed?

    y = lnu
    dy/du = 1/u
    dy/dx = 1/secx
    dy/dx = cosx

    :confused:
    Offline

    16
    ReputationRep:
    i think that's c4 :confused:
    Offline

    2
    ReputationRep:
    You can't just change the dy/du into dy/dx like that. Up to dy/du = 1/u, it's fine.

    Now use chain rule:

    dy/dx = (dy/du)(du/dx)

    dy/du = 1/u = 1/secx
    du/dx = secxtanx

    => dy/dx = (1/secx)(secxtanx) = tanx
    Offline

    0
    ReputationRep:
    Okay thanks :cool:
    • Thread Starter
    Offline

    2
    ReputationRep:
    What paper is that from ntrik?
    Offline

    0
    ReputationRep:
    Its the 'Exam Style Paper' in the Heinemann C3 for Edexcel textbook.
    Offline

    0
    ReputationRep:
    anyone got the markscheme for the mock paper?
    Offline

    16
    ReputationRep:
    2 sin x - 3 cos x in the form of R sin (x-a)

    2sinx - 3cosx = Rsin(x-a)
    =R[sinxcosa - sinacosx]
    =Rsinxcosa - Rsinacosx

    Therefore,
    2sinx ≡ Rcosa
    3cosx ≡ Rsina

    So R = √2² + 3² = √13
    a = arctan 3/2
    Offline

    0
    ReputationRep:
    Does anyone find that implicit differentiation is a much better calculus method then the whole quotent rule, chain rule turn by turn rubbish?
    • Thread Starter
    Offline

    2
    ReputationRep:
    Yep. But ill probs still use the quotient/chain rubbish
    Offline

    16
    ReputationRep:
    i'll use implicit for c4 as i want the method marks for c3, implicit should be in c3 imo, it's probably the easiest topic in c4.
    Offline

    2
    ReputationRep:
    (Original post by nas7232)
    i'll use implicit for c4 as i want the method marks for c3, implicit should be in c3 imo, it's probably the easiest topic in c4.
    No.. Binomial expansion is :cool:
 
 
 
Poll
Do you want your parents to be with you when you collect your A-level results?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.