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# OCR (MEI) Mathematics C3 20/01/2010 watch

• View Poll Results: How did you find the paper?
Easy
13
19.12%
OK-ish
28
41.18%
Hard
25
36.76%
I'm not sure/ i didnt take the exam/ ?
2
2.94%

1. HATED THAT PAPER. I thought C2 last week was a bit weird but this was worse.

I'll never be able to look at sin and cos in the same way ever again.....
2. Ok this group makes me feel better. For the first question, is x= minus infinity an answer as well as x=ln5? I diddn't know weather to put both...
3. I thought it was a good paper, although I imagine (and hope) that they slightly lower the grade boundaries. On the whole, I think I made one mistake but the rest was fine.
4. This is the 4th official thread.
5. (Original post by James Chawner)
Ok this group makes me feel better. For the first question, is x= minus infinity an answer as well as x=ln5? I diddn't know weather to put both...
x=ln5 only as e^x=/=0
6. i got (3pi/2,0) for P, but everyone i know got (pi/6,o)................
FML loool. Didn't you have to make cos3x= 0 ? If you insert 3pi/2 into this, you get cos3 (3pi/2) = 0???IM SOOO CONFUSED SUM1 PLEEZ EXPLAIN!!!thanx..
7. has anyone got the paper from today? i rememeber getting pi/18 - 1/9 for an answer, was it question 8 part iii)
8. I GOT THAT MARKKK!!!!exact same.. wrote it on ma hand lol
9. (Original post by tummy12345)
i got (3pi/2,0) for P, but everyone i know got (pi/6,o)................
FML loool. Didn't you have to make cos3x= 0 ? If you insert 3pi/2 into this, you get cos3 (3pi/2) = 0???IM SOOO CONFUSED SUM1 PLEEZ EXPLAIN!!!thanx..

Urmmm...no it was pie/6 becasue whe yu make

cos3x= 0 ...rember it crosses the x axiss at pie/2

so them yu divide by 3 so yu will get pie/6
10. I thought section A was nice but B was nasty.

You know the P Q question?...well I got the answer as pi/6, but then when I substituted it back into xcos3x in my calculator in radians mode it didn't come out as 0...so I crossed it out, and afterwards everyone has shown me that it works if you put the calculator in degrees mode and type 30 instead...why??!!
x=ln5 only as e^x=/=0
Ah i did e^x(e^x-5)=0 If I put both, would they mark me down would you imagine?
12. (Original post by James Chawner)
Ah i did e^x(e^x-5)=0 If I put both, would they mark me down would you imagine?

i dont think soo...hope for a good examier nd pluss they have likee loads of answerss near the side anyway soo i wouldnt worry too mch
13. hardest paper out of all the papers available online!
14. What did anybody get for the area between P and O question?
I got a negative answer but could spot what i'd done wrong :/
15. (Original post by MarkS2)
Did anyone get (pi/18) - (1/9) for one of the integration answers (can't remember which one) think it was
damn, just realised i got that wrong, i put pi/2 -1/9 because i thought
(1/3 x pi/6) = pi/2 god dam lol
16. lol the paper was ok only question where you needed to prove i knew the answer but i didnt knew how to write it down lolzz the rest was alright.
if some1 got the paper can they post it plzzz
tnx
17. (Original post by Rich-1991)
damn, just realised i got that wrong, i put pi/2 -1/9 because i thought
(1/3 x pi/6) = pi/2 god dam lol

you should only loose one mark....i did the same butt i left it as pi/6 nd forgott aboutt the 1/3
18. I honestly don't understand how people found that hard. It was sooo much better than all of the past papers I've done, and aside from a few minor mistakes (and a totally blonde moment on q4 - the integration one), I thought it was a lovely paper.
19. thanks mcl and a12345, that q. has been driving me crazy!
20. (Original post by MarkS2)
Did anyone get (pi/18) - (1/9) for one of the integration answers (can't remember which one) think it was

yesssss!
i got that
but i then changed 1/9 to 2/18
π-2/18

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