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Edexcel A2 C3 Mathematics 12th June 2015

Reply 1920

Original post by lightningdoritos

I don't understand what you mean here?

From memory the question said something about the line being a tangent to the other at a point. This means they touch and don't cross. This means the equation that you solve to find the coordinates of intersection of the two functions only has one solution.

Reply 1921

Bustamove

19

Original post by nbofni

I think the replacment papers were made in case the real paper was released to the public.
Honestly, I don't know why this one was 'withdrawn'. Nevertheless, I think they last years maths students would not of been happy to have had to sit this exam,,...

Im just having a flick through this paper... damn... this paper looks nasty...

Reply 1922

frozo123

12

https://07a69ccf283966549a9350d1a66951a7bc96e2dc.googledrive.com/host/0B1ZiqBksUHNYZ0JQM1NRcmdHdXM/June%202013%20QP%20-%20C3%20Edexcel.pdf

on 5b I've got 1/ ( 6x^2(x^2-1)^1/2 )

how do you go from there?

Reply 1923

Nashaa

Original post by ThePrestigeUK

All of a sudden day before the exam , i feel really unprepared?

Might be that I had a chem exam from hell yday that made the news

But yh I dont know might be nerves and , tomorrow morning ill perform but i dont like this feeling :frown:

The chemistry exam seriously threw me off.. lost all my confidence after that exam :frown:

Reply 1924

toddmcnugget

7

Original post by Bustamove

Anyone got any recommendation on hard papers that they have done? I've done papers from june 2010 till june 2014, but that was like 3 weeks ago... I've had other exams so I haven't done that much C3, I did june 2012 and jan 2012 2 days ago and got an A.. today I've done the june 2013 paper (again) and the june 2013 R paper... (I had economics unit 3 exam today so I havent had that much practice.. not as much as I would like anyway)...

which hard paper do you guys recommend that I do next? I'm probably going to just do one more paper before I sleep...
but then again.. I don't want to compromise my sleep... Ive had a long day today and C3 is in the morning... **** I hate having exams in consecutive days...

May just end up looking at the paper quickly.. anyway.. any suggestions?

http://www.physicsandmathstutor.com/a-level-maths-papers/c3-edexcel-bronze-silver-gold/ Gold papers involve all the hardest questions that have come up (apparently). Gold 4 is damn tough.

Reply 1925

Ohwhenwilson

1

hey guys, looking through some past papers (done 6 today now :biggrin:

)
i've noticed the only formula that might be somwhat tricky and not on the formula sheet is that
tan^2(x) = sec^2(x) - 1
so watch out for this one as it came up on to two or three! any other formulae people can think of that aren't on the sheet, and good luck everyone tomorrow!

Reply 1926

ojj_12

8

Original post by avninsa

Can anyone explain how bii and c are done? Mark scheme isnt helping much

Hope that helps :smile:

Reply 1927

JizzaStanger

4

Original post by Medicjug

What paper is this from?

Posted from TSR Mobile

I have no idea. I was just helping the guy with the question.

Reply 1928

Nashaa

Original post by moment of truth

I sat last years paper and actually thought it was okay. There were a few difficult questions, but that is expected. I just made too many mistakes and flopped. Whatever the paper is like, believe in yourself and your ability :smile:

Good luck!

Ah thank you, It's so scary :frown:

Reply 1929

Bustamove

19

Original post by toddmcnugget

http://www.physicsandmathstutor.com/a-level-maths-papers/c3-edexcel-bronze-silver-gold/ Gold papers involve all the hardest questions that have come up (apparently). Gold 4 is damn tough.

okay thanks :smile:

Reply 1930

jf1994

15

Do we need to know cos(-x) = cos(x) and sin(-x) = -sin(x)?

Reply 1931

anndz3007

2

Original post by stillthinking

how do you do 5b

why is it cos?

https://07a69ccf283966549a9350d1a66951a7bc96e2dc.googledrive.com/host/0B1ZiqBksUHNYZ0JQM1NRcmdHdXM/January%202014%20(IAL)%20QP%20-%20C3%20Edexcel.pdf

you differentiate it to find dy/dx , and put dy/dx=1/2
differentiation of sin is cos

Reply 1932

username1226161

15

Original post by JizzaStanger

From memory the question said something about the line being a tangent to the other at a point. This means they touch and don't cross. This means the equation that you solve to find the coordinates of intersection of the two functions only has one solution.

Just had another go at it, not sure what you would do after putting the discriminant to <0 because surely you would have to square root a negative value?

Reply 1933

suyoof123

2

Original post by mb_12

You know the sin^-1 button on a scientific calculator, arcsin is just another way of writing that, it is the exact same thing

Thanks!

didnt know that but we still have to learn those weird graphs.

Holy smack, its just reflected on the y=x axis then :colone:

TYVM!

(edited 8 years ago)

Reply 1934

WillGood

3

Original post by suyoof123

Thanks, I'll be sure to learn them in case.

2014 Q7, how would you apply those two rules.

Sorry my mistake, but 2013 Q3 is definately one (you can even check the mark scheme). Was planning going through other papers to find them and update post.

Reply 1935

ojj_12

8

Can anyone help with transformations and things with ln graphs and the asymptotes things. I cannot draw anything! I never got more than a 2b in art :colondollar:

Reply 1936

Gome44

10

Original post by jf1994

Do we need to know cos(-x) = cos(x) and sin(-x) = -sin(x)?

Probably not, but better to be safe than sorry

Reply 1937

Kevin De Bruyne

21

Original post by stillthinking

how do you do 5b

why is it cos?

https://07a69ccf283966549a9350d1a66951a7bc96e2dc.googledrive.com/host/0B1ZiqBksUHNYZ0JQM1NRcmdHdXM/January%202014%20(IAL)%20QP%20-%20C3%20Edexcel.pdf

Differential of sin.

Reply 1938

frankthebunny

7

Guys what are the tips tricks and **** like that for tomorrow im ****tng myself

Reply 1939

Gome44

10

Original post by lightningdoritos

Just had another go at it, not sure what you would do after putting the discriminant to <0 because surely you would have to square root a negative value?

I haven't done this question but I'm fairly certain you don't have to use the discriminant. Could be wrong though :smile:

Edexcel A2 C3 Mathematics 12th June 2015

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