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# C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST Tweet

Maths exam discussion - share revision tips in preparation for GCSE, A Level and other maths exams and discuss how they went afterwards.

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1. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
2. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
(Original post by paul272)
are u serious, equation of normal, i read it as though it was equation of tangent, i guess thats what happens when u have 3 hours of sleep before the exam,so peak for me
I had 3 hours of sleep but in almost every past paper i made that mistake, so when checking i made sure and realised
3. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
What do you think grade boundaries will be?
4. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
no improvement from my first time round dammit ¬¬ what a waste of £22
5. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
(Original post by Mr Tough)
me too, sick one

btw did you take x^-1/2 out of the brackets for 7a)

i did , but im pretty sure you get the same answer anyway
Yes, I did that too!
6. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
Please answer guys. For Q's 3, instead of using Arsey's method, I used the Rsin/cos (x-a) method to the answer. Will I get full marks?
7. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
hey arsey what about grade boundaries? what do you think 70/75 will be?
8. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
eurgh, i think i only got around 60/75
9. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
10. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
(Original post by Arsey)
solutions now in the first post
Hey, you know for 7a, you can take x^-1/2 out of the brackets right?

Thanks
11. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
Horrible horrible paper. Bye bye first choice uni.. that's the second impossible paper I've had this week..

12. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
Thank you Arsey! Seriously, really appreciate these solutions threads.
13. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
messed up question 8b and c hoping I'll get some working out marks for the big trigonometry question
can you not use double angle to work out the last section to the trig question?
14. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
i think it was harder in comparison to jan
jan was EASY!

i think 63 for an A
15. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
(Original post by pranav?)
hahaha pranav loool !
16. I ****ed it up so bad :'(:'(:'(:'( I was getting 100% on past papers but that was honestly the most difficult paper ever.
17. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
(Original post by The_Pen)
Please answer guys. For Q's 3, instead of using Arsey's method, I used the Rsin/cos (x-a) method to the answer. Will I get full marks?
If you mean for the differentiated part excluding the e^f(x) term, then yes that would be an alternate way of approaching the question and provided you still got the right answer, I cannot see a way they can fault you.
18. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
Woohoo! I loved it! The best C3 paper I have ever done, and thanks Arsey for the solutions. I think for 7 a) ii) I've got (80x)/(2x-1)^4, and part b) i've only got it as (cos^2(arctan(x/3))/6 or so; I mean as this is "in terms of x", I should get the marks, shouldn't I?
For 8 c) I got c=-7 instead of 7, so not much lost there - I think and hope that's an A for me
19. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
OMG, didnt see the x >0 for 3! but -pi/9!! still should be 100 ums :3
20. Re: C3 June 2012 - Post Exam Thread - Solutions and Paper in the FIRST POST
I really liked this paper although later I realised I messed up 7b, where I wrote a 1 instead of a 9. Oh well. I was write up to a point. Hopefully I only lost 2/3 marks on that question.

Thank you arsey for reassuring me. I was in a panic state for several hours after I realised that.
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