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    someone help
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    (Original post by iKaneee)
    Try 2014 R paper, hardest one ive seen
    Really?


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    anyone have grade boundaries for last year's c3 paper? Can't find them anywhere!
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    (Original post by JayGreen)
    when using dx/dy if you sub in the y value and flip the answer that gives you the gradient
    Correct
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    (Original post by aprocrastinator)
    anyone have grade boundaries for last year's c3 paper? Can't find them anywhere!
    66-a*
    60-a
    54-b
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    Guys for part C, why is the maximum function when the cos function is at a minimum, rather than when it's at a maximum?
    http://gyazo.com/3e96339a8a0d7e1be522e458487dab7d
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    (Original post by cerlohee)
    66-a*
    60-a
    54-b
    thank you! Do you happen to know what full ums was?
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    Do we need to know-

    - Half angle formula
    - factor formula
    - Proving double angle formula

    ?
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    (Original post by cerlohee)
    Guys for part C, why is the maximum function when the cos function is at a minimum, rather than when it's at a maximum?
    http://gyazo.com/3e96339a8a0d7e1be522e458487dab7d
    because you are taking away the function from 10 so if it was at max value then a larger number would be subtracted by 10, so smaller height
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    (Original post by aprocrastinator)
    thank you! Do you happen to know what full ums was?
    It's always 3xA-2xB so it's 72 )
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    (Original post by studentwiz)
    someone help
    which paper is this?
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    (Original post by aprocrastinator)
    because you are taking away the function from 10 so if it was at max value then a larger number would be subtracted by 10, so smaller height
    But I thought you were taking away the negative function, which is effectively adding the function?

    EDIT: o nvm i got it sorry!!! you're adding not subtracting the negative cos function haha
    thanku!
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    http://www.examsolutions.net/a-level...6&solution=8.2

    Why isn't cos() -1? Surely -21/25 is smaller than 21/25?
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    (Original post by TeeEm)
    just did this question with one of my students ... (he got eaten badly)
    Any takers
    Name:  ImageUploadedByStudent Room1434041292.982547.jpg
Views: 179
Size:  142.3 KBIs this the solution?


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    (Original post by studentwiz)
    someone help
    use the compound angles first
    sin(A - B) = sinAcosB - cosAsinB
    cos(A + B) = cosAcosB - sinAsinB
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    (Original post by cerlohee)
    It's always 3xA-2xB so it's 72 )
    whoa I never knew that lol. THANK YOU!

    (Original post by cerlohee)
    But I thought you were taking away the negative function, which is effectively adding the function?
    so the most negative value would be the minimum...?
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    (Original post by imedico10)
    which paper is this?
    https://drive.google.com/folderview?...JHS1ZSTHM#list
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    Those IYGB papers are extremely hard, hopefully nothing from there comes up tomorrow.
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    https://b3755649dbd1afe3db91a899c3b9...%20Edexcel.pdf

    Anyone help on Q2 part b, not sure where they're getting the solution from/what to use

    MS is here:
    https://b3755649dbd1afe3db91a899c3b9...%20Edexcel.pdf

    many thanks
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    (Original post by SuperMushroom)
    Worried haha, how about you?
    Not too bad.. I guess it depends whether the paper's good or not..
 
 
 
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