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    • Thread Starter
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    Just been doing this paper
    http://www.mei.org.uk/files/papers/c305ju_dskjtr.pdf

    Was wondering how you do Q8 i)

    Curve y = xsin3x crosses x axis at P.
    Find the x co-ordinate of P.

    So I made it = 0
    Then I had no idea what to do next!

    Its probably ridiculously simple but I can't work it out from the mark scheme.
    Help would be much appreciated
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    (Original post by jo7777)
    Just been doing this paper
    http://www.mei.org.uk/files/papers/c305ju_dskjtr.pdf

    Was wondering how you do Q8 i)

    Curve y = xsin3x crosses x axis at P.
    Find the x co-ordinate of P.

    So I made it = 0
    Then I had no idea what to do next!

    Its probably ridiculously simple but I can't work it out from the mark scheme.
    Help would be much appreciated
    Solve x \sin 3x = 0 and note that x \neq 0 from the diagram.

    Spoiler:
    Show
    You are looking for the first non-zero solution to sin 3x = 0
    • Thread Starter
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    (Original post by Mr M)
    Solve x \sin 3x = 0 and note that x \neq 0 from the diagram.

    Spoiler:
    Show
    You are looking for the first non-zero solution to sin 3x = 0
    Ah! Ok I was trying to make it more complicated than it actually is. Thanks.
 
 
 
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