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Maths Paper II (HL) - How was it?

1356

Comments

  • #62
    Dmullar
    Closed Accounts Posts: 67 ✭✭Dmullar


    Piste wrote: »
    God I hate maths.

    For the C part of the circle question I got an answer. Not the right answer you have to understand, because no answer could be as ridiculous as mine. Fractions all over the gaff.

    I got H in a quadratic on its own, then ended up with complex roots! Kinda gave up then....:(

    Thought the paper was a lot harder than paper 1, was hoping for an A but really really doubt it now.


    Oh, and that vectors question was class.


  • #63
    arthistory
    Closed Accounts Posts: 78 ✭✭arthistory


    Fince wrote: »
    i got the same as you in 1bi.
    unit vector i said was over 5, not root5
    got completey differnt for 3bii
    think your tana/2 is right
    Q5, 180 was an option as well

    Thanks...probably will lose 3 marks for no 180


  • #64
    xOxSinéadxOx
    Registered Users, Registered Users 2 Posts: 2,604 ✭✭✭xOxSinéadxOx


    I did ****!!! paper 2 isn't my best anyway but I found it very difficult, couldn't do loads of the (b) parts :eek: could only do the (a) part on Q8 and a bit of the (b) couldn't do the max/min volume at all. the circle, couldn't do part of (b) or (c). vectors. couldn't do the (b) part AT ALL. The line, think I got the whole question out. Trig couldn't do the (b) part of the first trig. couldn't do the (c) part or some of the (b) part on the second trig. I was planning on doing probabilty launched into got all confused and ****ed up, started to panic, made loads of mistakes so went off and did the trig instead

    ****E. :(


  • #65
    aine-maire
    Closed Accounts Posts: 456 ✭✭aine-maire


    did anyone else do further prob?

    it was all going really well...................

    and then c)ii

    I got something like 20,I think....:o


  • #66
    SugoiHito
    Banned (with Prison Access) Posts: 62 ✭✭SugoiHito


    arthistory wrote: »
    Thanks...probably will lose 3 marks for no 180
    I dont think you will cos 180 isnt part of the answer....cosx is equal to -1 in 180 and it was supposed to be 1 so your ok!!


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  • #67
    sock puppet
    Registered Users, Registered Users 2 Posts: 4,586 ✭✭✭sock puppet


    SugoiHito wrote: »
    I dont think you will cos 180 isnt part of the answer....cosx is equal to -1 in 180 and it was supposed to be 1 so your ok!!

    I got 0, 90, 270 and 360. But I always get the unit circle wrong so I'm not sure if it's right.


  • #68
    Fince
    Registered Users, Registered Users 2 Posts: 412 ✭✭Fince


    SugoiHito wrote: »
    I dont think you will cos 180 isnt part of the answer....cosx is equal to -1 in 180 and it was supposed to be 1 so your ok!!

    what a stupid mistake!! just remembered that i didn't +c the integration by parts as well.


  • #69
    .:FuZion:.
    Closed Accounts Posts: 160 ✭✭.:FuZion:.


    I just realised that I wrote down 2(6)^1/2 instead of 4(6)^1/2 for the trig with the cheese! Everything perfect until that! :mad: How many marks will I lose for it? :(


  • #70
    Fince
    Registered Users, Registered Users 2 Posts: 412 ✭✭Fince


    sock puppet wrote: »
    I got 0, 90, 270 and 360. But I always get the unit circle wrong so I'm not sure if it's right.
    it was 0 less than or equal x less than or equal to 180


  • #71
    SugoiHito
    Banned (with Prison Access) Posts: 62 ✭✭SugoiHito


    Fince wrote: »
    what a stupid mistake!! just remembered that i didn't +c the integration by parts as well.
    Haha i forgot the +c too....dammit...the more i look at it the more mistakes i see!!


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  • #72
    Swaine55
    Registered Users, Registered Users 2 Posts: 98 ✭✭Swaine55


    What was the answer for the cheese Q.
    I think i got ither 3(root8) or 8(root3)


  • #73
    .:FuZion:.
    Closed Accounts Posts: 160 ✭✭.:FuZion:.


    Swaine55 wrote: »
    What was the answer for the cheese Q.
    I think i got ither 3(root8) or 8(root3)

    4(root6) but stupid me not paying attention to my calculator wrote down 2(root6). :(


  • #74
    sock puppet
    Registered Users, Registered Users 2 Posts: 4,586 ✭✭✭sock puppet


    Fince wrote: »
    it was 0 less than or equal x less than or equal to 180

    Crap. I read 360. Should have checked.


  • #75
    Pygmalion
    Closed Accounts Posts: 5,082 ✭✭✭Pygmalion


    Not as good as Paper 1, I was still writing at the end so I didn't have time to look over what I'd done, I know I finished 3 questions (though didn't necessarily get them all right) and on each of other questions there was something that didn't really work out.

    For 8(b) me and 2 others in my class got the same answer, but got 233 for the approximate value of sqrt(17), so not really sure what the hell happened there.

    If f(x) = sqrt(1+x) then surely to get an approximate value for sqrt(17) you let x = 16?


  • #76
    SugoiHito
    Banned (with Prison Access) Posts: 62 ✭✭SugoiHito


    Pygmalion wrote: »
    Not as good as Paper 1, I was still writing at the end so I didn't have time to look over what I'd done, I know I finished 3 questions (though didn't necessarily get them all right) and on each of other questions there was something that didn't really work out.

    For 8(b) me and 2 others in my class got the same answer, but got 233 for the approximate value of sqrt(17), so not really sure what the hell happened there.

    If f(x) = sqrt(1+x) then surely to get an approximate value for sqrt(17) you let x = 16?
    Nah cos it said x is bigger then -1 but less then 1


  • #77
    aine-maire
    Closed Accounts Posts: 456 ✭✭aine-maire


    Pygmalion wrote: »
    If f(x) = sqrt(1+x) then surely to get an approximate value for sqrt(17) you let x = 16?

    No, -1<x>1.......I made the same mistake, did the whole question in the last 10 minutes :(


  • #78
    Fince
    Registered Users, Registered Users 2 Posts: 412 ✭✭Fince


    Pygmalion wrote: »
    Not as good as Paper 1, I was still writing at the end so I didn't have time to look over what I'd done, I know I finished 3 questions (though didn't necessarily get them all right) and on each of other questions there was something that didn't really work out.

    For 8(b) me and 2 others in my class got the same answer, but got 233 for the approximate value of sqrt(17), so not really sure what the hell happened there.

    If f(x) = sqrt(1+x) then surely to get an approximate value for sqrt(17) you let x = 16?

    it said that -1<x<1. it'll be sqrt(1+16).... sqrt(16(1/16+1)........ 4sqrt(1+1/16)

    x=1/16 and u multiply your answer by 4 at end


  • #79
    .:FuZion:.
    Closed Accounts Posts: 160 ✭✭.:FuZion:.


    Fince wrote: »
    it said that -1<x<1. it'll be sqrt(1+16).... sqrt(16(1/16+1)........ 4sqrt(1+1/16)

    x=1/16 and u multiply your answer by 4 at end

    I couldnt remember how to do that method and I had only looked at it last night. :rolleyes: So me and the whole class ( or most ) ended up getting 233 lol.


  • #80
    Pixiesticks
    Registered Users, Registered Users 2 Posts: 11 ✭Pixiesticks


    oh god. I hope was hopin for an A1 in maths but that was a terrible paper =(
    • I got completely bogged down in the circle question part c...wasted way too long on it
    • 2 was lovely
    • 3...ugh. forgot how to prove f(L) was a line. got m=1,0???
    • 4 was grand
    • 5...I got 8.00006 for part c...so i rounded it off to 8 and left it. ???
    • 7...(i know extra question. I didn't realise how much i'd done. honours maths and can't count...) for c I got root [(2sd1^2+3sd2^2)/5]
    • 8...took so long to cop that part b i only just got it down in time. and part c...I got lik 4piea^3/root 3???
    disaster...:mad:


  • #81
    KokaNoodles
    Closed Accounts Posts: 99 ✭✭KokaNoodles


    Anyone thought it was much easier than paper1? Dunno why but i usually prefer paper 1.


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  • #82
    SugoiHito
    Banned (with Prison Access) Posts: 62 ✭✭SugoiHito


    I think these are the answers for Q6 c part
    (i)1/10
    (ii)9/20
    (iii)3/20


  • #83
    Rob!
    Registered Users, Registered Users 2 Posts: 187 ✭✭Rob!


    SugoiHito wrote: »
    I think these are the answers for Q6 c part
    (i)1/9
    (ii)4/9
    (iii)5/27

    Completely different from mine!

    I got:

    6c(i) 1/10
    (ii) 9/20
    (iii) 1/10


  • #84
    Pygmalion
    Closed Accounts Posts: 5,082 ✭✭✭Pygmalion


    SugoiHito wrote: »
    I think these are the answers for Q6 c part
    (i)1/9
    (ii)4/9
    (iii)5/27
    I got:
    (i) 1/10
    (ii) 9/20
    (iii) I think 3/20


  • #85
    NerdPantzz
    Closed Accounts Posts: 35 ✭NerdPantzz


    horrible. had a little cry durring the exam... quietly though, as not to disturb anyone else. There weren't six questions I felt comfortable answering. The line and circle went well, I worked hard at them but it was down hill from there. Found question 7 very hard. Hope my paper1 result will bring me to a pass or its bye bye college for me!


  • #86
    Antamojo
    Registered Users, Registered Users 2 Posts: 404 ✭✭Antamojo


    I'm hoping I scraped a pass overall.
    Did ok, not brilliant.


  • #87
    Claypigeon
    Closed Accounts Posts: 660 ✭✭✭Claypigeon


    NerdPantzz wrote: »
    horrible. had a little cry durring the exam... quietly though, as not to disturb anyone else. There weren't six questions I felt comfortable answering. The line and circle went well, I worked hard at them but it was down hill from there. Found question 7 very hard. Hope my paper1 result will bring me to a pass or its bye bye college for me!

    :rolleyes: Crying? What course are you gunning for? All of your courses require math?


  • #88
    DáireM
    Registered Users, Registered Users 2 Posts: 129 ✭✭DáireM


    Pygmalion wrote: »
    I got:
    (i) 1/10
    (ii) 9/20
    (iii) I think 3/20

    Me too. HIGH FIVE


  • #89
    ~Candy~
    Closed Accounts Posts: 435 ✭✭~Candy~


    did any1 use the tan2a formula to get the tan A/2 thingy


  • #90
    galway.gaa
    Closed Accounts Posts: 145 ✭✭galway.gaa


    ~Candy~ wrote: »
    did any1 use the tan2a formula to get the tan A/2 thingy
    no i drew a right angled tringle cos we already had cos15/17. i think i got 4/15 or something like that


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  • #91
    Dmullar
    Closed Accounts Posts: 67 ✭✭Dmullar


    ~Candy~ wrote: »
    did any1 use the tan2a formula to get the tan A/2 thingy


    Yep. Really can't remember what answer I got though.


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