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    Need help with the last part i dont get the mark scheme.
    I got dy/dx=0. i get the bit about the normal being undefined but I dont get the x=tan(pi/4)
    Therefore x=1 bit. What happens to y?
    http://m.imgur.com/z2zjGFt,kZKYEPh
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    (Original post by Super199)
    Need help with the last part i dont get the mark scheme.
    I got dy/dx=0. i get the bit about the normal being undefined but I dont get the x=tan(pi/4)
    Therefore x=1 bit. What happens to y?
    http://m.imgur.com/z2zjGFt,kZKYEPh
    It's a vertical straight line. x=1.

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    (Original post by Zacken)
    It's a vertical straight line. x=1.

    How did you know that? Why cant it be y=1?
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    (Original post by Super199)
    How did you know that? Why cant it be y=1?
    Ah not to worry got it
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    (Original post by Super199)
    How did you know that? Why cant it be y=1?
    Because the gradient of the normal is undefined. Does the horizontal line y=1 have an undefined gradient? (hint: no it has zero gradient), a vertical line has a undefined gradient.
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    (Original post by Zacken)
    Because the gradient of the normal is undefined. Does the horizontal line y=1 have an undefined gradient? (hint: no it has zero gradient), a vertical line has a undefined gradient.
    Yh cheers man got it
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    (Original post by Zacken)
    Because the gradient of the normal is undefined. Does the horizontal line y=1 have an undefined gradient? (hint: no it has zero gradient), a vertical line has a undefined gradient.
    Nice 'hint'.
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    (Original post by B_9710)
    Nice 'hint'.
    I realised after. :rofl:
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    (Original post by Zacken)
    It's a vertical straight line. x=1.

    what package are you using for these graphs?
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    (Original post by TeeEm)
    what package are you using for these graphs?
    Just typed it into Wolfram Alpha and copy pasted it here
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    (Original post by Zacken)
    Just typed it into Wolfram Alpha and copy pasted it here
    what about the other with the circle and the triangle?
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    (Original post by TeeEm)
    what about the other with the circle and the triangle?
    Found it off google images
 
 
 
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