CCEA A2 Maths C4 1st June 2012

I was in sheer panic whilst doing this exam but managed to collect myself and, all in all, I think it went very well (at least in comparison to everyone else :P)

4) ii) (-2,6) and (2, -6) I am pretty happy with this

5) 1/4 tan 4x + 11/4 very confident in this answer

6) iii) I got (0,0,3) - a few others in my further maths class got this so I am fairly confident, my working made sense in my head but I didn't believe this answer when I arrived at it

8) ii) I got 0, 180 and 360 (this is definitely correct)

Sorry for all the random questions but just say if I got:

C1 - 82
C2 - 61 (but resitting this - aiming for 80+)
M1 - (resat this - say about 74)
C3 - 75
C4 - CRAP LOL (just say I've got 60)
M2 - will undoubtedly be a fail.

What's the highest grade I have the chance of getting. I need a B

C1 - 98
C2 - 95
C3 - 92 (resat in may, potential 100 :})
C4 - 85-95
M1 - 98
S1 - doing this wed, hoping for an A

I don't think 70/75 will not be a A* mark since everyone found this exam so hard. Have a look at http://www.thestudentroom.co.uk/wiki/A-star_grades_at_A-level#What_about_Maths_A-level.3F which shows how A*s are calculated. I think 6) ii) is just the vector equation of the line (I also expanded it out). Because in part ii) you did not know that OP was perpendicular to the line so it could have been one of any number of values.

what was the answer to 2 ii

you don't know how happy you just made me there, i wrote the vector equation of the line for 6 part 2, although i'm worrying it was just 3k instead as thats all it took to move the origin on to the line. and as for the thing about my 70/75, well based on january, that would get me above 90%, but i don't think it gets me 92% which is what i need.

you're having doubts, and you're doing maths. Well I'm ****ed.

That sounds alright, say if I was to work my ass of and get 90% in C2, would I be certain of a B?

sAuhsoj - the volume of the paperweight.

Yeah, i got the same thing as you, except i forgot to take the 360 reading, so i'm pissed at that. Also made silly errors like in question 7 where i didn't give the exact value, and in 4 part 2, where we had to find the stationary points. I knew x=-3y, and i found one of the points as (2,-6) but forgot that (-2,6) also would have been valid.
I did however get the vectors question, and the co-ordinates of P are (0,0,3), but didn't get the position vector, but i think it might simply be 3k. Apart from the vectors question (which took me most of an hour to do), the test wasn't that bad i thought, although i'm annoyed cos i need 92% for the a*, and based on the answers given by my teachers (all 3 gave unanimous answers), i have around 70/75, based on how many marks i lose for the above mistakes, and due to scaling, 70/75 will most likely be scaled below 92%, which is a pity, cos I really wanted an a* as i doing maths next year

For 8ii, I got 2tanx or 1+tan^2x=0, so tanx=0 and tan^2x= -1. so I said x=0,180,360 reading off the tanx graph, then said no solutions for tan^2x= -1. Probably wrong lol.

I was in sheer panic whilst doing this exam but managed to collect myself and, all in all, I think it went very well (at least in comparison to everyone else :P)

4) ii) (-2,6) and (2, -6) I am pretty happy with this

5) 1/4 tan 4x + 11/4 very confident in this answer

6) iii) I got (0,0,3) - a few others in my further maths class got this so I am fairly confident, my working made sense in my head but I didn't believe this answer when I arrived at it

8) ii) I got 0, 180 and 360 (this is definitely correct)

i got them too except for the vectors one. i found the co-ordinates of P to be (-2,1,0)
I didn't know how to approach this question but i knew since that they were perpendicular, their dot product equalled zero. So i made a =(ai +bj +ck) and b = (-i-2j). Basically just used basic logic to get my answer. Really devastated with the Vol. of revolution, didn't have time to go back and check aswell because it took me three attempts on the proof. Anyone doing math at uni next year?

what was the answer to 2 ii

I got the same! Loads of people didn't register the -1 and ended up getting 7 answers.

The vector question parts ii and iii are on the Further Maths syllabus?



I got the same answers as you for those questions




I'm doing maths & physics next year for the co-ordinate of P in the vectors I had (1-t)i + (2-2t)j + 3k and put the dot product with the line l equal to zero and worked out t as 1 to get (0,0,3).




I got 512 pi over something..I've forgotten the bottom line of the fraction


My teacher was really annoyed about how CCEA introduced 3 new styles of questions into the same paper. After the exam he went to write a very angry letter to CCEA :P

I'm doing maths & physics next year for the co-ordinate of P in the vectors I had (1-t)i + (2-2t)j + 3k and put the dot product with the line l equal to zero and worked out t as 1 to get (0,0,3). :P