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AQA A2 Mathematics Pure Core 4 MPC4 - 17th June 2016

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1. (Original post by Arima)
lol all this debate about the last question i don't even know what standard integrals are... never even been taught it let alone revised it. yikes.
because it's part of FP2. The integral of the form 1/a^2+x^2 gives 1/a(tan^-1(x/a)) and the derivation and use of it is taught in FP2. AQA just thought it was funny to include that in C4 paper
2. (Original post by C0balt)
yes, c was pi
I think I might've put 6 instead of a sixth but I can't remember, I'm hoping I put the latter but it didn't affect my value of c fortunately as X was 0

Do you remember if for the Cosθ question if 0<θ<360 or were there equal signs under because for I think I would've lost a mark for putting the Cosθ=1 values which were 0 and 360
3. Am I the only one who thinks AQA doesnt give enough time?
4. what was question 5 about??? i have literally forgotten anything to do with it but i can remember i found it okay
5. Really confused as to why I got -42 +9/2ln3.....
6. (Original post by DEWR98)
I think I might've put 6 instead of a sixth but I can't remember, I'm hoping I put the latter but it didn't affect my value of c fortunately as X was 0

Do you remember if for the Cosθ question if 0<θ<360 or were there equal signs under because for I think I would've lost a mark for putting the Cosθ=1 values which were 0 and 360
it was 0<x<360, so yes you'd lose a mark
7. (Original post by tiffanyyyyyyy)
what was question 5 about??? i have literally forgotten anything to do with it but i can remember i found it okay
Might have been the trig question with sinA and sinB
honestly i cannot remember though
8. (Original post by shah321)
Am I the only one who thinks AQA doesnt give enough time?
No
9. (Original post by -jordan-)
Well I'm afraid it's 6, I have attached the working.
Attachment 551908
Yes jords

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10. (Original post by C0balt)
because it's part of FP2. The integral of the form 1/a^2+x^2 gives 1/a(tan^-1(x/a)) and the derivation and use of it is taught in FP2. AQA just thought it was funny to include that in C4 paper
it's in C4 (or C3), too. It's also in the formula booklet. (it's in my C3/C4 book, at least).
11. (Original post by C0balt)
Might have been the trig question with sinA and sinB
honestly i cannot remember though
oh yea it was lol. thanks !
12. (Original post by ubiquitousking)
it's in C4 (or C3), too. It's also in the formula booklet. (it's in my C3/C4 book, at least).
Yeah I know it's in the formula booklet. I didn't see it in my C4 book though
13. (Original post by tiffanyyyyyyy)
what was question 5 about??? i have literally forgotten anything to do with it but i can remember i found it okay
It was the cosA = 1/root(5) etc. question.
14. Anyone remember the gradient question with t and able to work through it?
15. (Original post by C0balt)
because it's part of FP2. The integral of the form 1/a^2+x^2 gives 1/a(tan^-1(x/a)) and the derivation and use of it is taught in FP2. AQA just thought it was funny to include that in C4 paper
wooaow thank god... now i feel slightly better
16. (Original post by Salty carpet)
Anyone remember the gradient question with t and able to work through it?
I used the quotient rule 2 times, simplified it etc etc. Took a good 15 minutes and ended up with 0.5e^4
I don't know how you could differentiate them bloody parametrics without the quotient rule.
17. (Original post by C0balt)
because it's part of FP2. The integral of the form 1/a^2+x^2 gives 1/a(tan^-1(x/a)) and the derivation and use of it is taught in FP2. AQA just thought it was funny to include that in C4 paper
Use of the standard integral for inverse tanx is on the Core 3 spec though. Shouldn't be unfamiliar to anyone. There wont be anymore than 1 mark available for just using the standard integral though, required you to derive it which I thought they guided you through fine, just required you to properly understand implicit differentiation and spot the use of the trig identity.
18. (Original post by steph-carys)
Really confused as to why I got -42 +9/2ln3.....
19. (Original post by shah321)
Am I the only one who thinks AQA doesnt give enough time?
I agree, I keep running out of time in maths and FM exams, which is really frustrating because I'm certain I could answer the questions I missed if I had a bit more time to look at and play with them...
20. (Original post by Salty carpet)
Anyone remember the gradient question with t and able to work through it?

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