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    (Original post by goofyygoober)
    the least value is 2 because the least value for cosx is -1.
    Therefore, 5+3cosx=2
    cosx=-1
    and you can solve
    Argh silly I didn't see that. Thanks
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    (Original post by nayo-nica)
    how many marks was 9a. worth?
    4marks
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    (Original post by tajtsracc)
    The 3rd transformation question was a stretch in the y-direction by a scale factor 3, right?

    Also, as someone else asked, how many marks are lost if you didn't do anything correct beyond 5 + 3cosθ?
    Stretch in y-direction by sf 3 is correct!!!
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    What did you guys get for the coefficient of X^10? I got something like 1648
    Also, what did you get for the perimeter for the triagnle/sector thing?
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    (Original post by goofyygoober)
    Stretch in y-direction by sf 3 is correct!!!
    That's good, I saw someone post earlier that it was an x-direction stretch by s.f. 1/3 and I started worrying lol
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    Also, on the first question for part B I got the wrong answer but got the method right I think, would that still get 2/3?
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    (Original post by salome12)
    What did you guys get for the coefficient of X^10? I got something like 1648
    Also, what did you get for the perimeter for the triagnle/sector thing?
    Ye -1648

    And 13.8
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    (Original post by salome12)
    What did you guys get for the coefficient of X^10? I got something like 1648
    Also, what did you get for the perimeter for the triagnle/sector thing?
    My answer was in minus?
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    What did you find for the value of k? Does anyone remember?
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    (Original post by MotorboatMyGoat)
    Argh silly I didn't see that. Thanks
    To be honest, it was a poorly worded question in my opinion, I wasn't sure what they meant by "least possible value", good thing I did assume it meant the lowest possible value, so I got the value as 2 and x=pi.
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    (Original post by salome12)
    What did you guys get for the coefficient of X^10? I got something like 1648
    Also, what did you get for the perimeter for the triagnle/sector thing?
    I got -1648 and the perimeter one I got 13.8(3s.f)
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    (Original post by tajtsracc)
    That's good, I saw someone post earlier that it was an x-direction stretch by s.f. 1/3 and I started worrying lol
    I Wrote that but it's wrong, the reason it is 1/3 in x is because you would get ( (3x)^2+9)^1/2 which you can then factorise out the nine and when you square root it, gives u the new expression with the three on the outside.
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    (Original post by tajtsracc)
    My answer was in minus?
    Mine was negative too .in the thousands
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    (Original post by Loukia98)
    What did you find for the value of k? Does anyone remember?
    11/2
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    (Original post by Bradley99)
    Also, on the first question for part B I got the wrong answer but got the method right I think, would that still get 2/3?
    What is the question about?
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    (Original post by goofyygoober)
    I got -1648 and the perimeter one I got 13.8(3s.f)
    Nice, I got both of those too, looks I'm on track for a strong A-grade then!
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    You!
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    Go and vote

    http://www.thestudentroom.co.uk/show....php?t=4117033
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    (Original post by goofyygoober)
    I got -1648 and the perimeter one I got 13.8(3s.f)
    Oh yeah that's what I meant 😊
    I think I got the same for the perimeter too .
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    Wasn't K = -5.5 as the tangent was to the left of the max point?
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    (Original post by Parhomus)
    I Wrote that but it's wrong, the reason it is 1/3 in x is because you would get ( (3x)^2+9)^1/2 which you can then factorise out the nine and when you square root it, gives u the new expression with the three on the outside.
    What is the original function for x?
    Is it (x^2+9)^1/2 or (x^2+1)^1/2?
 
 
 
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