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# Edexcel C2 20th May 2015 *Official Thread* watch

1. (Original post by Sharaf371)
Where's the unofficial mark scheme
I'm making it chill, we just finished the exam GEEZ

Posted from BEHIND YOU
2. Tbh all i was thinking about after that last question was who the hell pays £483 to polish some glass. Clearly I'm in the wrong business!
3. Can someone please post the exact questions so I can have a go?
4. (Original post by ALEVEL_STUDENT)
I'm making it chill, we just finished the exam GEEZ

Posted from BEHIND YOU
Hurry up.
Thanks.
5. (Original post by HarshaPeed)
well I changed to sin in cos x tan and then factorised out cos to get
cos(3theta)(tan(3theta -root3)=0
then i did tan(3theta)= root3
and cos(3theta)=0 and i got 6 solutions in total.
There was only 3 mate 0<x<180

Posted from BEHIND YOU
6. I reckon 62 for an A, if I'm honest it wasn't much harder then the other edexcel papers I've done, the only difference being that you're sitting in an exam hall a fairly stressful environment, not in the comfort of your own home, so its likely people are going to make silly mistakes.

But going from that, i really can't see it being lower then 61 for an A, nor can I see it being higher then 64 for an A...
But who knows aye...
7. (Original post by HarryDESMOND)
immigration is a serious issue

*integration
8. (Original post by HarryDESMOND)
immigration is a serious issue
ur mom is a serious issue
9. (Original post by Kevi14)
You got the last one wrong as it does not cost £3 for a whole clean (common sense) but you sub 2.92 which was r back into the equation to get the whole cost which was C!
harder than a solomon paper? lol are they having a laugh?
10. How many marks was the question on the minimum value of C?
11. Thumbs up if you want me to produce a unofficial mark scheme (under way atm)

Posted from BEHIND YOU
12. (Original post by RBoss)
The range was from 0=x<360...
Yeah within the range mate. Inverse tan root 3. Don't u get a positive and negative for square root?
13. (Original post by frozo123)
harder than a solomon paper? lol are they having a laugh?
R
U
AVIN
A
LARF
mate
14. UNOFFICIAL MARK SCHEME

Can someone direct me to it
How did people solve

sin(3theta)-(Sqrt3)cos(3theta)=0 0=theta<pi

??
For this question I think many people have got wrong.

From Sin x / Cos x = tan x

We can get sin x = cos x tan x

Therefore cos3xtan3x -root3 cos3x = 0

Cos 3x ( tan 3x - root 3) = 0

...And solve

Posted from TSR Mobile
16. This paper was easier than C1. Loved it.
17. (Original post by anndz3007)
Q1: 1024-1280x+720x square
Q2: (x-2) square -(y+1) square= 20
Part b i got gradient =1/2, x-2y-14=0
Q3: A=-96,B=-48
Fractorise =3(x-4)(x+4)(2x+1)
Q4:40.9 perimeter and 96.7 area
Q5: r=8/9,a=18,n=28
Q6=32+194=226
Q7:y=1/3 or y=3/2
Q8i/9,4pi/9,7pi/9
Cosx=1+/- square root of (1+16k) devided by 8
X=0, x=136.8 or 138.6 something,x=221.4
Q9: 483
On question 5 I got r=(85/126)^1/2 or somewhere around there that was very close to but not exactly 8/9 and when I put it back in to find a it gave me 17.988 so I rounded up would I get the marks?
18. Wow,ccompared to last year this paper and the c1=dead
19. (Original post by dripper)
UNOFFICIAL MARK SCHEME

Can someone direct me to it
http://strawpoll.me/4406285/r
GG

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