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# Edexcel A2 C4 Mathematics June 2015 - Official Thread watch

1. Can someone that works in a school please post the paper!
2. (Original post by jonnycope7)
for the time question in the biological population thing, does it matter if used degrees, cos people said it should be in radians?
it has to be radians, it is calculus
3. Did anyone else use the sine rule for the shortest length vector question?
4. (Original post by PhysicsFiend)
Nope, they ignore working after the correct answer's been written when they mark it.
Ah nice! Thanks
5. (Original post by mrno1324)
****s' sake, give him some time.
have i given him enough time yet mr i dont mind my own businness
6. (Original post by jonnycope7)
for the time question in the biological population thing, does it matter if used degrees, cos people said it should be in radians?
I believe calculus requires radians, however, it is possible that the mark scheme accepts use of degrees. I, particularly, believe it will.
7. (Original post by TeeEm)
can someone that works in a school please post the paper!
I thought you're a teacher???

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8. Lol, were we supposed to use radians or degrees for the population-time question? In the end, I just gave two answers and put a side-note to take the radians answer if you can only take one because I read through the question 5 times and didn't get a clue.

Also, for the length between a point and the line, do you just do the modulus of the intersection point subtract the point you to find by plugging in mew = 1?
9. (Original post by Wahid1)
I thought you're a teacher???

Posted from TSR Mobile
a teacher?!
10. (Original post by anorris13)
it has to be radians, it is calculus
how many marks would i lose, just the answer mark?
11. What page are the pictures of the paper, I wanna know how many marks each question was, I lost quite a lot answer marks
12. have you got photos of the last question?
thank you!
13. (Original post by C++)
I believe calculus requires radians, however, it is possible that the mark scheme accepts use of degrees. I, particularly, believe it will.
I can't see why it would allow degrees, it is completely wrong
14. I would say the exam was quite average, except that it had some tricky elements, for example, in a question-that-I-can't-remember-the-number-of, P is in thousands or integration of 3^x, some people in my class struggled with that one. Also I found it took me a long time to answer the questions for not many marks compared to other past papers. I'm sure everyone would do better if there were less questions worth more marks.
15. 73/75 estimate for C3 and 61/75 estimate for C4... anyone reckon i could have an a*?
16. wats the answer for q8b?
17. Am I the only one who found the c3 exam a lot easier than this c4 exam??

Those c3 questions just made sense. C4 on the other hand...
18. What about 3e^-1 as an answer for 8a. When it got to y-9=9ln3(x-2) I divided through by 9 to get y/9 =ln3x-2ln3+1, with y=0, 0=ln3x/9 + 1 then e^-1=3x/9 and then x=3e^-1 ?!???!?!
19. (Original post by Zeus579)
I think I got that
A lot of people got 31.8.. Lets see who is right!
20. Waiting for an unofficial mark scheme so badly!! In my opinion this is not a hard paper but I hv made a lot of careless mistakes!!!

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