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    Is Q. 9(i) not 2pi/a?
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    (Original post by student199919)
    i think i got something like 38, i'm probably wrong
    Yeah, that's what I got
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    (Original post by emily240266)
    Does anyone know how many marks each question was to add to mark scheme?
    I have updated it now with marks
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    Q1, both parts were 2 marks each
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    anyone mind doing the 4 mark integration q7 showing the working ??
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    Predictions for an A? I say 61, was easier than most past papers
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    predictions of grade boundaries?
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    Pretty sure a=3/5 as its 2pia because 1 period of sin(2x) would be covered by 720 degrees
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    I got question 8i and ii mixed up. I wote the answer to 8ii in 8i. In i i wrote stetch by 1/9 parallel to y whereas i should have wrote it in ii. Do you think they will give me the mark?
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    (Original post by MCP041998)
    Is Q. 9(i) not 2pi/a?
    ah no its definitely 4pi/3 because it was tan not sin
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    Can someone work me through question 1i, I think I got something different. How did you guys get 10.
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    (Original post by iamDev)
    I got question 8i and ii mixed up. I wote the answer to 8ii in 8i. In i i wrote stetch by 1/9 parallel to y whereas i should have wrote it in ii. Do you think they will give me the mark?
    Probably not
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    (Original post by sandpitturtle)
    ah no its definitely 4pi/3 because it was tan not sin
    Of course! My bad.

    I reckon usual grade boundaries - lots of people at my school found it quite hard I think and not generalising but TSRs are usually the higher end.

    I'm pretty sure that like 58 will be an A, 65 or so for 90 UMS.
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    Kill yourselves OCR,
    thanks.
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    (Original post by Johnstond)
    Can someone work me through question 1i, I think I got something different. How did you guys get 10.
    You know 20 is the area and ½abSinC is the area so therefore ½x8xbxsinC=20

    4bSinC=20 therefore bSinC=5 and Sin(30) is ½ therefore ½b=5 therefore b =10.
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    (Original post by AlfieH)
    Of course! My bad.

    I reckon usual grade boundaries - lots of people at my school found it quite hard I think and not generalising but TSRs are usually the higher end.

    I'm pretty sure that like 58 will be an A, 65 or so for 90 UMS.
    Yeah i only just realised! And to the grade boundaries I agree, people at my school found it alright apart from last question especially, probably similar to last year maybe 1 or 2 higher my guess
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    Can we make the mark scheme so people can't edit it, as there are some sad people with nothing better to do deleting it or adding annoying things!!
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    Can someone please tell me why this working out (attached) is apparently wrong for the last question?
    Everyone is saying that the second answer was 4π/3, but I got 7π/3...

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    Was the question where you found out the value of k after the binomial expansion 2 marks or 3 marks?

    (The one where k was +/-3^1/2 and not 1/9 or 0 (fs))
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    (Original post by Heyitsmerhi)
    Pretty sure a=3/5 as its 2pia because 1 period of sin(2x) would be covered by 720 degrees
    Nah sin2x would cover 180 degrees so a=5/3
 
 
 
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