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OCR C4 (not mei) 18th June 2013 revision

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Original post by ninuzu
Still got three more after tomorrow...


Which exams?!


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Reply 201
Original post by sophiekutie
Yep :wink: I enjoy it but It's a lotta work
To be honest though if I knew that the exams were gonna change like this I wouldn't have done it! With no January exams I have to sit all 6 units in June next year..... :'(


yeah i've got the same :mad:

i wouldn't have taken further maths had I known it would change but oh well, further maths is an "extra" A level for me anyway (doing 4 A2s)
Original post by stirkee
yeah i've got the same :mad:

i wouldn't have taken further maths had I known it would change but oh well, further maths is an "extra" A level for me anyway (doing 4 A2s)


Yeah same! But I still wanna do well in it :smile:
What other 2 subjects are you doing?
(edited 10 years ago)
Having a bit of a blank moment how do I integrate cos^3(2x)
Original post by sophiekutie
Having a bit of a blank moment how do I integrate cos^3(2x)


cos ^2 (2x) x cos 2x)

then change cos^2 (2x)
I reckon they'll be a big Integration by Parts 7/8 marker on this paper as there was only a smaller 4 marker on Jan 2013 as well as June 2012.
Reply 206
Original post by sophiekutie
Oooooh I'm looking forward to that! What's it like? Is it hell?


Yep, especially as C3, FP2 and a two hour physics paper was all on the same day...
Reply 207
Original post by ScarlettFierce


S2, M2 and a physics paper.
Original post by ninuzu
Yep, especially as C3, FP2 and a two hour physics paper was all on the same day...


BLECHHHHH!!!!!


Was C3 a re-sit? how did you find the paper?
Original post by printergirl
cos ^2 (2x) x cos 2x)

then change cos^2 (2x)


Would this be right...?

Original post by sophiekutie
Is my method and answer right here? It just seems... Odd... :tongue:
image.jpg
Reply 210
Original post by sophiekutie
Yeah same! But I still wanna do well in it :smile:
What other 2 subjects are you doing?


economics and (pre-u) history
Reply 211
Original post by sophiekutie
Would this be right...?


I don't think it's right. Line 2 doesn't simplify into line 3
Reply 212
Original post by sophiekutie
Would this be right...?

I think it is right because the answer is 0
Reply 213
Original post by sophiekutie
BLECHHHHH!!!!!


Was C3 a re-sit? how did you find the paper?


No, my school didn't enter us for any January exams, so it was the first time doing C3. Found it alright - the last question took me about 10 minutes to figure out what to do, but I got it in the end. We did FP2 first, so C3 seemed a heck of a lot easier.
Original post by jamesaung
I don't think it's right. Line 2 doesn't simplify into line 3


Umm I'm pretty sure it does... Using the rule cos^2(x) = (1+cos2x)/2. ?
How do you do JAN 2013 Q8 ii):

1371488361309.jpg

Answer is:

1371488352880.jpg

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Original post by ninuzu
No, my school didn't enter us for any January exams, so it was the first time doing C3. Found it alright - the last question took me about 10 minutes to figure out what to do, but I got it in the end. We did FP2 first, so C3 seemed a heck of a lot easier.


Ohhh okay :smile:
Yeah same! My answer was wrong in the end but my working was okay (method marks please:wink:). That sounds a bit backwards! Haha but nice for you to have an easier exam afterwards.
Reply 217
Original post by sophiekutie
Ohhh okay :smile:
Yeah same! My answer was wrong in the end but my working was okay (method marks please:wink:). That sounds a bit backwards! Haha but nice for you to have an easier exam afterwards.


Yeah, you can get almost full marks for method marks, so hopefully you'll be fine :smile:
Reply 218
Original post by daniel_vincent
How do you do JAN 2013 Q8 ii):

1371488361309.jpg

Answer is:

1371488352880.jpg

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midpoint of BD will be [(5+1)/2, (4+6)/2, (-3+3)/2]

= (3,5,0)

the direction vector will be [(3-3), (5-2), (0-1)]

so r = (3,2,1) + t(0,3,-1)
Original post by ninuzu
Yeah, you can get almost full marks for method marks, so hopefully you'll be fine :smile:

I hope so :smile:

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