Thread: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

1. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

nah the resulting integral should be root 3 tan inverse root 3???? not one on root 3 tan inverse root 3?

2. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

what would be the e4 cutoff ???? carrotsticks? anyone?

3. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

Originally Posted by kwonjiyong
nah the resulting integral should be root 3 tan inverse root 3???? not one on root 3 tan inverse root 3?
if you're talking about the t sub question, im pretty sure carrotstick's solution is correct

4. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

Originally Posted by stesoo
if you're talking about the t sub question, im pretty sure carrotstick's solution is correct
ohhhh okay yep no worries LOL i was remembering wrong

5. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

Originally Posted by kwonjiyong
what would be the e4 cutoff ???? carrotsticks? anyone?
lol
im also interested in what the cutoff would be

6. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

Originally Posted by mrbunton
lol
im also interested in what the cutoff would be
possibly anywhere between 68 and 74 based off the large majority of people finding the exam very difficult but who knows there could be a lot of quiet kids that may have found it easy

7. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

I've updated the solutions. Thanks everybody for your input.

Also please like this meme so I can feel validated as an oldie who can still connect with students.

Smash that like button, remember to subscribe, and click on the bell notification so you don't miss out.

9. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

Hey @Carrotsticks, because it was a 'find' question for Q16bii), I chucked one of these ones to find the ratio lmao

https://www.dropbox.com/s/thzsne7o0a...6b%29.png?dl=0

Surely they wouldn't penalise this?! The co-ordinate axes could quite easily be generalised via a linear transformation.

10. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

Originally Posted by raghib483
Hey @Carrotsticks, because it was a 'find' question for Q16bii), I chucked one of these ones to find the ratio lmao

https://www.dropbox.com/s/thzsne7o0a...6b%29.png?dl=0

Surely they wouldn't penalise this?! The co-ordinate axes could quite easily be generalised via a linear transformation.
This is actually the best way of doing these. Regarding penalty, I actually cannot say for sure, but I am reasonably confident it will be okay. Amongst endless non-attempts, they see someone have a different solution. It will get given a lot of attention for sure, and hopefully those people know the maths behind it. I think it'll be accepted.

@other people reading this, in general any system that's been tilted you can 'untilt' and work the ratio from here. For more reading look up "Affine Transformation". Heaps of past HSC questions on things like this.

11. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

2 things,

Looking for a copy of the paper, is there anything anywhere?

With the rotation of the conic point thingo, i made it into a complex number and multiplied by i then converted it back. It got me the answer so I hope I'm not wrong.

12. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

Originally Posted by Carrotsticks
This is actually the best way of doing these. Regarding penalty, I actually cannot say for sure, but I am reasonably confident it will be okay. Amongst endless non-attempts, they see someone have a different solution. It will get given a lot of attention for sure, and hopefully those people know the maths behind it. I think it'll be accepted.

@other people reading this, in general any system that's been tilted you can 'untilt' and work the ratio from here. For more reading look up "Affine Transformation". Heaps of past HSC questions on things like this.
cheers bruv!

tbh I used to do stuff like this all the time in my HSC before I knew what affine transformations were. At SB the teachers were pretty chill about hack solutions, but I was often quite suspect if they were like that as markers. It was mostly out of sheer laziness, I'd just look at a length and be like 'Nah fk you imma let you be one unit' (3d trig <3). Or look at a point and go 'nah I don't like where you are, gtfover here'.

I was super psyched when I saw you put this idea to use in your 4U 2013 BOSTES transformation in Q16b)-d), but ofc you made em prove it lmao.

14. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

Real talk; really disappointed that the difficulty of HSC papers (even this years one) have gone done drastically over the years :'(

This 4u paper was a meme

15. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

This is coming from someone who skipped anything that looked like mechanics, conics or any other question that required heaps of thought.
But I reckon there were a lot of easy marks in there. I haven't done past papers so I don't know if it's common, but yeah without studying I reckon you could get a solid 40 or 50 (not sure if this is usually the case)
But yeah, the hard stuff was REALLY hard

16. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

u guys reckon a low 60 could make an e4? I need closure lol

17. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

Originally Posted by Lolihentai
u guys reckon a low 60 could make an e4? I need closure lol
maybe around a 64 if you're lucky. keep in mind in 2013 a 63 went to an 89 and people are comparing the difficulty of that paper to ours

18. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

When I did the 2013 paper I thought it had the easiest last question I've ever done in a 4 unit exam. Honestly I had a lot more problems with Q15 than Q16. Was 2013 really that hard?

19. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

Originally Posted by fan96
When I did the 2013 paper I thought it had the easiest last question I've ever done in a 4 unit exam. Honestly I had a lot more problems with Q15 than Q16. Was 2013 really that hard?
Fingers crossed it was, because I felt that ours was honestly harder than 2013.
If it was, aligning will be good

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20. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

Originally Posted by fan96
When I did the 2013 paper I thought it had the easiest last question I've ever done in a 4 unit exam. Honestly I had a lot more problems with Q15 than Q16. Was 2013 really that hard?
i didn't do the 2013 paper so i can't really answer. i had just only looked at the aligning on rawmarks.info. i'm just hoping the aligning is similar to, if not better than 2013 because that's the only way ill get a 97 hsc mark

21. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

Originally Posted by 1729
i'm just hoping the aligning is similar to, if not better than 2013 because that's the only way ill get a 97 hsc mark
same... I was hoping for 97 too but I'm gonna need a small miracle to get it.

22. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

Originally Posted by fan96
When I did the 2013 paper I thought it had the easiest last question I've ever done in a 4 unit exam. Honestly I had a lot more problems with Q15 than Q16. Was 2013 really that hard?
2013 graduate, can confirm I lost way more marks in Q15 than 16.

23. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

Originally Posted by Carrotsticks
LOLLL U actually made me look it up.... AND IT EXISTS
BABAAHAHAHA

But like, with all seriousness, what would you guys have done to better prepare for the last questions ? WHat would you have changed to cater for these questions?

My 4u is in 2020
I have tried the paper, did the questions i could do. The last question got up to ii and gave up lol
will probs try it again tday

24. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

Originally Posted by integral95
2013 graduate, can confirm I lost way more marks in Q15 than 16.
How would you compare the difficulty to this years paper?
Hoping the cutoff is similar to 2013...

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25. Re: Carrotsticks' Extension 2 HSC 2018 Solutions + Memes

Originally Posted by HeroWise
LOLLL U actually made me look it up.... AND IT EXISTS
BABAAHAHAHA

But like, with all seriousness, what would you guys have done to better prepare for the last questions ? WHat would you have changed to cater for these questions?

My 4u is in 2020
I have tried the paper, did the questions i could do. The last question got up to ii and gave up lol
will probs try it again tday
exposure to all of elementary mathematics will help but there are only so many hours in a human lifetime.

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