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    ugh, i'm so upset about the x=tan y one. wasted so much time trying to understand what it was about and how it fits into the first one, and it turns out to be so straight forward

    GAAH
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    (Original post by sb1234)
    Even though it specifically asked for it in the form 1/cos x?
    lol the question said secx can be written as 1/cosx, show that dy/dx=tanxsecx

    no matter what way you do it! as long you get dy/dx=secxtanx you will get full mark, provided you show your method clearly and nicely.
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    Paper was tricky, made som mistakes such as the 7 marker, I didn't think cot2x=0 would have solutions, and also the fg(x ) range where I put it >= 3. I guess the 100 percent was never meant to be. (theres always C4 )
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    (Original post by kosy91)
    DOMAIN OF G(X) IS X>1
    yes I am well aware of that my obnoxious friend. BUT, is the domain of fg(x) x>1. No it isnt is it. You should be aware that g(e+1) = 1. Such that fg(e+1) = f(1) = 3 , when you apply it into the new composite function.

    But I am indeed aware that the range probably is fg(x)>3
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    (Original post by chris_mon)
    I did that! I feel really silly now looking back at it. It could of cost me an A grade
    Everyone i talked to put the Tany thing back into the first equation...

    Our only hopes for good grades are low grade boundaries because everyone fails...
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    (Original post by chris_mon)
    I did that! I feel really silly now looking back at it. It could of cost me an A grade
    fff meeee thats what i did, might of threw 5 or 4 marks away!!!!
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    (Original post by taherq)
    i might get 67/75 approximately how much will it be in UMS
    90+

    Why were you worried?
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    (Original post by MHorman)
    Everyone i talked to put the Tany thing back into the first equation...

    Our only hopes for good grades are low grade boundaries because everyone fails...
    my mate treated as a separate question and showed me that she was right, ug it was so easy if they where to make it a bit more obvious
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    (Original post by Tlc-X3)
    me and half my class did that!
    i think it was a propper badly worded q! x
    (Original post by Nonbeatific)
    agree 100%
    sorry, how? it's clearly two separate parts of the question

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    E-A-S-Y

    Although Ive thrown away a few marks.

    (I said that cot2x=0 has no solutions, only got up to ln(3X)+7x+2=ln(15) in 9i)b) aaand erm. drew the graph of f(x)+1, not f(-x)+1)
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    i hated that log questions the one with 3 ^x ... ive looked at the unofficial markscheme and I started doing all that working then croseed it out !!! GRRRRR I do think it was a hard paper, especially compared to past papers and stuff.. tho I found out liek 5 minutes before that our teachers said we were "due for a hard one"

    I agree that I found it as bad as C2 , tho the grade boundaries for C2 were:

    A- 53
    B- 45
    C-38
    D-31
    E-24

    :/
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    (Original post by Remarqable M)
    lol the question said secx can be written as 1/cosx
    not quite



    to me, that's a strong indication they want you to write it as 1/cosx and use the quotient rule
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    (Original post by Doughboy)
    90+

    Why were you worried?
    IM NOT WORRIED , JUST ASKING

    WAT ABOUT U HOW MUCH DO U EXPECT U WILL GET OUT OF 75
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    (Original post by john1234567)
    sorry, how? it's clearly two separate parts of the question

    I get how they got it wrong, I mean first it asks you to calculate the DY/DX, then it asks you to show that DY/DX = 1/(1+x^2).
    If you're stressed and in a rush, you can easily get it wrong.
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    (Original post by john1234567)
    not quite



    to me, that's a strong indication they want you to write it as 1/cosx and use the quotient rule
    ok im not sure on that, either way as long as you get the answerr I don't see where the problem is??:confused: I've been always told that you can use whatever method suites you as long as it is clear and mathematically written then examiner will have no problem. I will prove you wrong when the examiner mark scheme comes out
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    (Original post by Arsey)
    x
    Will you be doing the C4 paper on monday?
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    i think i lost marks on the 9 b the differentiation. and on the find coordinates (a,b) question.
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    I couldn't do the dx/dy x=tany question - I did dx/dy and wrote out an expression for dy/dx, so I guess I'll end up with 2/3 marks for that? Also, I only got 22.5 and 112.5? I think? For one of the questions, so lost a couple of marks there. Also, I think on one of the differentiation questions I wrote 2x^2 + 1 rather than multiplying and getting x^2(x^2+1). So I've lost like, one mark there I think. I'm not sure about hte rest, but think I did pretty alright. That was a horrible, horrible paper though. Given these flaws, any idea what I'll get?
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    (Original post by Remarqable M)
    ok im not sure on that, either way as long as you get the answerr I don't see where the problem is??:confused: I've been always told that you can use whatever method suites you as long as it is clear and mathematically written then examiner will have no problem. I will prove you wrong when the examiner mark scheme comes out
    You're right lol, you can do this question by quotient or product rule. It's all the same tbh.
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    (Original post by Arsey)
    that is a very kind post; however, I have absolutely no idea what all this rep business is about. Just trying to help and I also benefit from learning from your experiences of the paper(s).
    How do you think the paper compared to June 2006's paper? Do you think 73/74 would be sufficient for full UMS marks on this paper? (I know it's pretty hard to say, but the 100 UMS cap, for June 2006, was 70).
 
 
 
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