**HL Maths P2 Before/After

FaoiSin

Emz93 wrote: »

Does anybody know if Geometry can come up as one of the long questions? (7/8) Generally it seems, statistics, trig and bits of probability is what comes up in the long qs but better be safe than sorry! Planning on just learning the theorems off perfectly so 25 marks in the bag for Q6A!

I believe Geometry is only examinable in question 6 but some of the basics might be necessary for the Trig in 7 or 8.

cocopopsxx

I can't do trig AT ALL- those 3D shapes and pyramids- they seem so impossible! I just can't see angles. even in the old course I avoided it as much as I could, loved the probability though but we had choice back then! I wish they'd just put period and range and all that easy trig on q7/8 too

mcpaddington

So are these the only things that we have to be able to prove?
Theorem 11, 12 and 13.
Trig formulas 1-7 and 9.

emmamurphy233

mcpaddington wrote: »

So are these the only things that we have to be able to prove?
Theorem 11, 12 and 13.
Trig formulas 1-7 and 9.

Also proof by contradiction! It has been asked as 6A twice I think, although one was just a sample paper.

cocopopsxx

Are solutions to SEC sample papers available online??

Hayezer

Anyone know if I should bother going over trigonometric equations, things like double angles,compound angles, all that stuff?

Blink182rock

http://www.projectmaths.ie/exam-papers/sample.asp ......:)

Blink182rock

cocopopsxx wrote: »

Are solutions to SEC sample papers available online??

oppss,

http://www.projectmaths.ie/exam-papers/sample.asp .....:)

mcpaddington

Remember to know how to find the standard deviations using the calculator and etc people!

pajero12

Hayezer wrote: »

Anyone know if I should bother going over trigonometric equations, things like double angles,compound angles, all that stuff?

Yes Definitely!

paddyhes

is there anywhere online where you can find a list of the definitions you need to know?
like ''random sampling'' ''cluster sampling'' and all that other stuff?

cocopopsxx

Blink182rock wrote: »

cocopopsxx wrote: »

Are solutions to SEC sample papers available online??

oppss,

http://www.projectmaths.ie/exam-papers/sample.asp .....:)

Thanks a million

reznov

I bought a pocket clinometer.


You jelly?









:cool:

K_1

DepoProvera wrote: »

Yer man on the radio said Geometry had to be confined to question 6.

The theorems and cuts are, but a knowledge of all the geometry stuff will be required for the long trig question.

DepoProvera

Could an example of proof by contradiction be from paper 1? To prove a rational function has no turning points: differentiate, let f'(x)=0 and it gives a false statement... Or does it have to be from Paper 2?

raindodger

What are ye using for practice? You can only do the SEC paper so many times and I don't trust the sample papers in the test papers.

K_1

raindodger wrote: »

What are ye using for practice? You can only do the SEC paper so many times and I don't trust the sample papers in the test papers.

Old course paper 2's.

finality

raindodger wrote: »

What are ye using for practice? You can only do the SEC paper so many times and I don't trust the sample papers in the test papers.

Going back over the revision exercises in the book.

Speaking of the revision exercises, can anyone help with this question?

A bag contains 4 red counters and 6 green counters. Four counters are drawn at random from the bag (and not replaced). Calculate the probability that
(iv) at least two green counters are drawn, given that at least one of each colour is drawn.

I just can not get the answer in the back of the book (it's 85/97).

edit: never mind, I just got it, was just leaving out the last step

leaveiton

I was listening to Countdown to 606 a few nights ago and they guy said something about being able to do the line of best fit on your calculator. Anyone know how to do this? I'm terrible at seeing it by eye.

ehshup

on my calculator, there is an option for a, b and r (the correlation coefficient). For the line of best fit, select a, which gives you the constant, and b, which gives you the x coefficient, i.e. if a = 3 and b = 7, the line of best fit is y = 7x + 3

cocopopsxx

Finality how did you get that answer? I still can't get it....

finality

cocopopsxx wrote: »

Finality how did you get that answer? I still can't get it....

You get the probability that exactly 2 will be green and the probability that exactly 3 will be green, add them as it's one or the other, then divide by the probability that at least one of each colour is drawn. I can post a solution if that's confusing :P

cocopopsxx

Yea if it's not too much hassle can you post it please?

finality

there I doubt they'll put something that difficult on the paper... that is, I hope they won't

ehshup

finality wrote: »

there I doubt they'll put something that difficult on the paper... that is, I hope they won't

thanks for the answer, do you mean probability that one of each colour is drawn, not green?
Although it's personal preference, I find it much more intuitive for the second part to treat it as 1 - P(all one colour) which can be done by 1 - [P(RRRR)+P(GGGG)]. which gives 97/105

bobjimmy

Hey lads say if your to draw a scatter plot how would you know which would be the x values and which would be the y values

finality

ehshup wrote: »

thanks for the answer, do you mean probability that one of each colour is drawn, not green?
Although it's personal preference, I find it much more intuitive for the second part to treat it as 1 - P(all one colour) which can be done by 1 - [P(RRRR)+P(GGGG)]. which gives 97/105

Lol! yes I do, can't believe I wrote "one of each colour is green", hahaha.

My way of doing that seems crazy now, but it was my first instinct on how to do it. Your way is much less complicated

ehshup

By the way, can anyone explain to me the given solution for 9A part (a), I've never had to use the 95% confidence interval in that way.?
http://www.ncca.ie/en/Curriculum_and_Assessment/Post-Primary_Education/Project_Maths/Project_Maths_Pre-leaving_Exam_Papers_Feb_2010/P_Maths_LC_HL_Paper_2_with_solutions.pdf

finality

bobjimmy wrote: »

Hey lads say if your to draw a scatter plot how would you know which would be the x values and which would be the y values

I don't think it matters as you're just showing the correlation? Could be wrong there though.

Chuchoter

How do we time it? IS there any defined structure?