C4 parametric equation

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  1. David_Skiller's Avatar
    1 20-06-2012  10:33
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    C4 parametric equation
    http://pdf.ocr.org.uk/download/pp_08..._gce_4724.pdf?

    Q9A

    How am I supposed to find the co-ordinate of A? I know how to find B, but unsure how to find A.

    Thanks
  2. David_Skiller's Avatar
    2 20-06-2012  10:46
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    • Posts: 126
    Re: C4 parametric equation
    bp
  3. notnek's Avatar
    3 20-06-2012  10:47
    • TSR Demigod
    • Location: Bangkok, Thailand
    Re: C4 parametric equation
    (Original post by David_Skiller)
    http://pdf.ocr.org.uk/download/pp_08..._gce_4724.pdf?

    Q9A

    How am I supposed to find the co-ordinate of A? I know how to find B, but unsure how to find A.

    Thanks
    At that point, y is maximum (in the region shown) so 4\sin\theta is maximum. What's the range of the sine function?
  4. David_Skiller's Avatar
    4 20-06-2012  11:45
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    • Posts: 126
    Re: C4 parametric equation
    (Original post by notnek)
    At that point, y is maximum (in the region shown) so 4\sin\theta is maximum. What's the range of the sine function?
    Brilliant, thanks. I understood it was a maximum, but then tried differentiating lol, thank you.
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