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C4 parametric equation

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    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
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    (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?
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    (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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Updated: June 20, 2012
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