***2015 LC Maths Paper 1 - Higher Level - June 5th***

Chef Tony

What did people get for the plane question about its angle from 4km away? I got 15 degrees after rounding and it seemed about right

eoin12345

Magnate wrote: »

Goddamnit...

That's it I think I shall bid farewell to this thread, that was probably the question I was most confident about.

Are you sure it wasn't 8?

I got 8 too

cathalio11

I got 2 degrees after rounding.

oops

PotmBottom

Chef Tony wrote: »

What did people get for the plane question about its angle from 4km away? I got 15 degrees after rounding and it seemed about right

I got the same, I used tan^-1(slope) and got 14.58 or something like that.

MmmPancakes

Magnate wrote: »

Goddamnit...

That's it I think I shall bid farewell to this thread, that was probably the question I was most confident about.

Are you sure it wasn't 8?

http://prntscr.com/7dgzh0

You double each next term as it bounces up and falls back down, ie it travels the same distance twice (the first term doesn't because it was dropped from 2m!)

Magnate

eoin12345 wrote: »

I got 8 too

I think I realised what we did wrong, didn't account for the ball going down too. So that answer would be double that minus 2 I think. Oh well.


Edit: Yep, beat me to it mmpancakes!

dazzadazza

How far off were people's answers for trapezoidal and integration. I got like 35u squared for trapezoidal and like 360 for the integration part haha

Chef Tony

dazzadazza wrote: »

How far off were people's answers for trapezoidal and integration. I got like 35u squared for trapezoidal and like 360 for the integration part haha

I had 35 for the estimation and 36 for the real. The error I think was something like 2.6, but I could of gotten that bit wrong

Grey Wind

dazzadazza wrote: »

How far off were people's answers for trapezoidal and integration. I got like 35u squared for trapezoidal and like 360 for the integration part haha

I got 35 and 36.

Peg14

de moivres??
oh well time for me go before I realise what other huge messes I've made.Peace out.

MmmPancakes

dazzadazza wrote: »

How far off were people's answers for trapezoidal and integration. I got like 35u squared for trapezoidal and like 360 for the integration part haha

Got 35 and 36 respectively, put the 1 over 35 for the second part instead of 36 though

dazzadazza

Chef Tony wrote: »

I had 35 for the estimation and 36 for the real. The error I think was something like 2.6, but I could of gotten that bit wrong

Hmm... I wonder if I'm off by a factor of 10 because I did it completely wrong or because of some silly blunder.

fin709

An absolute ridiculous exam, skills were much too easy, maybe excluding part (iii) in 1 and the complex number part (ii), and the last 3 questions were outrageously difficult. Poor form from SEC, just a day after the english paper 2 proved disgracefully predictable they dissappoint again

Chef Tony

Actually had difficulty with part 1 of the finacial maths question, despite it being waay easier than I thought it would be. I had no trouble changing the annual interest into monthly, but my mind went completely blank for changing it from monthly to annual.

That and all of question 2 were my "mind blanks". I threw down the -b formula of all things for question 2

Peregrine

Chef Tony wrote: »

What did people get for the plane question about its angle from 4km away? I got 15 degrees after rounding and it seemed about right

Was this a trigonometry question?

MmmPancakes

Am I the only one who got 88 for the angle of the plane?

Troxck

Nim wrote: »

Was this a trigonometry question?

Yeah, Trig played a minor role in Question 7!

Chef Tony

Nim wrote: »

Was this a trigonometry question?

No, trig in on paper 2. It did include a bit of The Line though, which is pretty strange seeing as that is also supposed to be a paper 2 section. It was a question about a planes descent and it was plotted by a certain, long winded function.

You work out in the previous question the derivation of the function, then you use this derivation as the slope into the tan0=m1+m2/1-m1m2 using the x axis as the other slope, to get its angle from the ground at a certain point

Bah_Humbug

cathalio11 wrote: »

I got 2 degrees after rounding.

oops

I got 2 degrees too but..

Kremin

Magnate wrote: »

Goddamnit...

That's it I think I shall bid farewell to this thread, that was probably the question I was most confident about.

Are you sure it wasn't 8?

It was 14. You have to realise the ball goes down AND UP.. so you multiply by 2... but take away two at the end because it drops from 2metres and doesnt go up 2 metres again.


I honestly think i might have got 300/300 for that paper, did anyone else get 16* SOUTH OF EAST for the plane question? What I did was find the slope and let it equal to tanalpha

AnnaTorvFan

MmmPancakes wrote: »

Am I the only one who got 88 for the angle of the plane?

Pretty sure I got either 88 or 89.

Did anyone else get 8m as the last part for Q1?

Kremin

DarraghF197 wrote: »

Very nice paper. It showed how easy they were making it in the last question. They should asked for the shortest day of the year which meant we would have used the unit circle and stuff.

The surd question i found tricky, not sure if I got the last part right, the weird function confused me as to where the turning point would be.

For the complex number, what did everyone get? I got '0' at first, but went back and did it slightly differently and I got -1/w.

I got the image wrong for the plane question, which rules out the possibility a flawless.

I got both too, initially i replaced 1 with w^n because it said the complex number was equal to that, and hten i rearranged the sequence and got 0. but doing it different ways got different results so i dont know.

The oil spill question was actually really nice once I realised what I had to do. Got the last part right so I'd assume everything previous was right too.

jameshan

My angle for the plane was REALLY small, like less than 1 as far as I can remember, but the first significant figure was 2 i think

The_Mac

Did terrible, the only one I think I answered fully correctly was question 1.

Praying to god the attempt marks are in my favour. Hoping for a good paper 2.

AnnaCU

dazzadazza wrote: »

How far off were people's answers for trapezoidal and integration. I got like 35u squared for trapezoidal and like 360 for the integration part haha

I got 35 for trapezoidal as well and 36 for integration

Chef Tony wrote: »

I had 35 for the estimation and 36 for the real. The error I think was something like 2.6, but I could of gotten that bit wrong

I think the error was 2.7 or 2.8

Chef Tony

The trapezoidal one gave me a fright for a minute, when the first half of the equation equaled zero, thankfully the double negative in the second part left me with 36, which was nice and close to 35

MmmPancakes

For the oil question, did you get dV/dt = 1273.blah ml/min?

AnnaTorvFan

Was the oil spill (can't remember what word they used for it) a cylinder or a circle?

Bah_Humbug

MmmPancakes wrote: »

Am I the only one who got 88 for the angle of the plane?

I got 2 degrees, and 90 - 88 = 2 so there's something there maybe
How did people get 15?

MmmPancakes

AnnaTorvFan wrote: »

Was the oil spill (can't remember what word they used for it) a cylinder or a circle?

I said cylinder, because they gave you a thickness, which I said was h