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    (Original post by HecTic_H)
    Grade boundaries anyone?
    Going to guess:
    41 - C
    47 - B
    53 - A
    59 - A*
    Really difficult paper imo.
    I don't think they'll be that low, a little bit higher maybe 55-A?
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    Grade boundary predictions?
    A*-62 A-56 B-49 ?
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    (Original post by daniellon)
    is the new equation x(-2x+5) and -cos*-1(-x)?
    Yeah
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    For the integration question i found the area of trapezium and then substracted the area underneath the curve from it.

    how many marks will i get
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    (Original post by connorbarr)
    sinBsec^2B=27cosBcosec^2B?
    Yes thats the one thanks! I messed up somehow and got tanB = 27 😭
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    What was the question for where everyone is getting pi/6? Like what did the question ask again?
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    (Original post by mil88)
    I got all but 81.92 part.

    I got 65.5.. and thus 66.
    Greater than or equal to 3a
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    What did people get for the number next to t in question 3 so then they could find the mass?
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    I am pretty sure f(x) >= 3a because it was mod(2x + a) + 3a so if x = -1/2a you get f(x) = 3a
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    Hi,
    What was question 9iib?
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    (Original post by underestimate)
    Hi,
    What was question 9iib?
    pi/6
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    (Original post by Agent47_)
    pi/6
    What did we have to find out, like the equation given
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    Can anyone remember the 1st equation you had to integrate in Q2?

    Think it was something like (4-1/x)^5

    If so, wouldn't the answer be x^2/6(4-1/x)^6...with no ln ?
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    (Original post by underestimate)
    What did we have to find out, like the equation given
    It was something like sin4x(tanx + cotx) = 1



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    (Original post by jonnydowe)
    Unofficial mark scheme HERE: https://docs.google.com/document/d/1...it?usp=sharing
    For 2i), it says these two equations are equivalent, are they? I got the second one through integration by inspection and I'm still concerned they're not.
    Anyway, if not I'm at 69/72 I think. Hope that's 100ums but you can never be sure. Hoping C4 will be solid now.
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    (Original post by GM16)
    It was something like sin4x(tanx + cotx) = 1



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    Thank you!
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    (Original post by zintanax)
    For the one about modulus, I only got 1 answer as x = 1.5a because when you draw the graphs they only intersect once - did anyone else get that?
    I did this! I discredited the second answer (I tried subbing it back in but it didn't work so thought it must be invalid).
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    (Original post by Agent47_)
    pi/6
    Thanks!
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    If I wrote all real values for y for the range do I get any marks?
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    Plugging pi/6 into a calculator gives 2, not 1, it was 0.6something


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