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***JC 2014 Maths Paper Two - Mon. June 9th 2014 - all levels***

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    #62
    Scrublord420
    Registered Users Posts: 27 ✭Scrublord420


    Hello fellow scrubs yeah i thought paper 2 was well easier than paper one can i ask what did anyone get for question 8 i got the first part but i got stuck on the others


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    #63
    coolerboy
    Registered Users Posts: 589 ✭✭✭coolerboy


    Liordi wrote: »
    I'm almost sure the swing was 7.4.
    Tan X = 5/4
    X = Tan -1 (5/4)
    X = 51.34

    51.34 * 1.2 = 61.6

    Tan 61.6 = x/4
    4 Tan 61.6 = x
    x = 7.39
    x = 7.4

    Idk if that's right or wrong but how I did it.

    Why do you have to multiply by 1.2 ?


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    #64
    Liordi
    Registered Users Posts: 2,226 ✭✭✭Liordi


    coolerboy wrote: »
    Why do you have to multiply by 1.2 ?

    You're increasing it by 20%


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    #65
    Gerrymandering reborn
    Registered Users Posts: 302 ✭✭Gerrymandering reborn


    coolerboy wrote: »
    Why do you have to multiply by 1.2 ?
    HE INCREASED it by 20%


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    #66
    Liordi
    Registered Users Posts: 2,226 ✭✭✭Liordi


    Scrublord420 wrote: »
    Hello fellow scrubs yeah i thought paper 2 was well easier than paper one can i ask what did anyone get for question 8 i got the first part but i got stuck on the others

    Got the slope to be 1/3
    1, -2 wasn't on the line.
    y - y1 = m ( x - x1)
    As they're parallel m is the same

    y - (-2) = 1/3 (x - 1) (3)
    3y + 6 = x - 1
    x - 3y - 7 = 0


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    #67
    Liordi
    Registered Users Posts: 2,226 ✭✭✭Liordi


    coolerboy wrote: »
    Was it the swing question

    The coordinate geometry question.


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    #68
    DanielChester
    Registered Users Posts: 53 ✭✭DanielChester


    One of the questions on co-geometry asked if the line was perpendicular to another, I said no. It was towards the end, did anyone get that?


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    #69
    ECM1234
    Closed Accounts Posts: 225 ✭✭ECM1234


    Liordi wrote: »
    I'm almost sure the swing was 7.4.
    Tan X = 5/4
    X = Tan -1 (5/4)
    X = 51.34

    51.34 * 1.2 = 61.6

    Tan 61.6 = x/4
    4 Tan 61.6 = x
    x = 7.39
    x = 7.4

    Idk if that's right or wrong but how I did it.

    Where did the 4 come from? Was that you're distance from A-B ?


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    #70
    yaEHya
    Registered Users Posts: 114 ✭✭yaEHya


    Ah I even got that easy question wrong.how was 5 the hypothenis?


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    #71
    Liordi
    Registered Users Posts: 2,226 ✭✭✭Liordi


    yaEHya wrote: »
    Ah I even got that easy question wrong.how was 5 the hypothenis?

    Tan is opp/adj


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    #72
    Liordi
    Registered Users Posts: 2,226 ✭✭✭Liordi


    ECM1234 wrote: »
    Where did the 4 come from? Was that you're distance from A-B ?

    Yeah.


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    #73
    ECM1234
    Closed Accounts Posts: 225 ✭✭ECM1234


    DanielChester wrote: »
    One of the questions on co-geometry asked if the line was perpendicular to another, I said no. It was towards the end, did anyone get that?

    Same here, because the slope are not equal to -1 ! :)


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    #74
    Gerrymandering reborn
    Registered Users Posts: 302 ✭✭Gerrymandering reborn


    Liordi wrote: »
    Got the slope to be 1/3
    1, -2 wasn't on the line.
    y - y1 = m ( x - x1)
    As they're parallel m is the same

    y - (-2) = 1/3 (x - 1) (3)
    3y + 6 = x - 1
    x - 3y - 7 = 0

    YEs i got that


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    #75
    Liordi
    Registered Users Posts: 2,226 ✭✭✭Liordi


    DanielChester wrote: »
    One of the questions on co-geometry asked if the line was perpendicular to another, I said no. It was towards the end, did anyone get that?

    Yup, they weren't perpendicular. :)


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    #76
    yaEHya
    Registered Users Posts: 114 ✭✭yaEHya


    Liordi wrote: »
    Tan is opp/adj

    I thought it was adjacent over hypothesis ffs


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    #77
    ECM1234
    Closed Accounts Posts: 225 ✭✭ECM1234


    Gerrymandering reborn wrote: »
    YEs i got that

    I got that, but thought it was wrong, so I did the question again, can I still get the marks?


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    #78
    Liordi
    Registered Users Posts: 2,226 ✭✭✭Liordi


    ECM1234 wrote: »
    I got that, but thought it was wrong, so I did the question again, can I still get the marks?

    If you didn't scribble it out, you might get low/high partial. :)
    This is why people are adamant to avoid using tippex.


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    #79
    yaEHya
    Registered Users Posts: 114 ✭✭yaEHya


    Gerrymandering reborn wrote: »
    YEs i got that

    At least I got that


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    #80
    ECM1234
    Closed Accounts Posts: 225 ✭✭ECM1234


    Liordi wrote: »
    If you didn't scribble it out, you might get low/high partial. :)
    This is why people are adamant to avoid using tippex.

    I didn't use tip ex, hopefully I can still get the marks :)


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    #81
    yaEHya
    Registered Users Posts: 114 ✭✭yaEHya


    I was thinking sohtahcoa in my head not sohcahtoa such a ****ing rehab haha


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    #82
    yomtea98
    Closed Accounts Posts: 941 ✭✭✭yomtea98


    Liordi wrote: »
    Yup, they weren't perpendicular. :)

    It was.


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    #83
    Scrublord420
    Registered Users Posts: 27 ✭Scrublord420


    DanielChester wrote: »
    One of the questions on co-geometry asked if the line was perpendicular to another, I said no. It was towards the end, did anyone get that?

    The lines had the same slope so they were perpendicular i think


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    #84
    coolerboy
    Registered Users Posts: 589 ✭✭✭coolerboy


    For question 1 what was the probability I thinkvi got 9/64 but I think its wrong


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    #85
    Liordi
    Registered Users Posts: 2,226 ✭✭✭Liordi


    yomtea98 wrote: »
    It was.

    Which question are you talking about?
    I'm referencing when the slopes were 5/4 and - 5/4.


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    #86
    ECM1234
    Closed Accounts Posts: 225 ✭✭ECM1234


    yomtea98 wrote: »
    It was.

    No, it wasn't if it was , their slopes would be equal to -1


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    #87
    Liordi
    Registered Users Posts: 2,226 ✭✭✭Liordi


    coolerboy wrote: »
    For question 1 what was the probability I thinkvi got 9/64 but I think its wrong

    3/8, which is the same as 9/64. :)
    So, yeah. ^^


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    #88
    yomtea98
    Closed Accounts Posts: 941 ✭✭✭yomtea98


    ECM1234 wrote: »
    No, it wasn't if it was , their slopes would be equal to -1

    And they were. 5 over 4 and -5 over 4 multiplied equal -1


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    #89
    coolerboy
    Registered Users Posts: 589 ✭✭✭coolerboy


    Liordi wrote: »
    3/8, which is the same as 9/64. :)
    So, yeah. ^^

    Its not 3 doesnt go into 64 evenly


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    #90
    Gerrymandering reborn
    Registered Users Posts: 302 ✭✭Gerrymandering reborn


    Liordi wrote: »
    3/8, which is the same as 9/64. :)
    So, yeah. ^^

    Are you HIGH? 3/8 is 24/64


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    #91
    Liordi
    Registered Users Posts: 2,226 ✭✭✭Liordi


    yomtea98 wrote: »
    And they were. 5 over 4 and -5 over 4 multiplied equal -1

    1.25 * - 1.25 =/= -1.


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