Mathematics: Post your doubts here!

[PhyZac]

Esme

When I saw Esme tagged you...
I was like I am so sleepy to solve a question..! But haha, turns out something else.

May Allah s.w.t make your exam easy Aameen.. ( you better sleep now, it is late)

 

[Adorkableme]

someone please help me solve Qs 6i from http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_qp_32.pdf ......... I get upto the part of finding dy/dx but I am getting stuck somewhere in the next part not sure!!

and Qs 5i from ... http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_qp_31.pdf

ANYONE???

 

[Khalid Mohammed Okiely]

Best of luck for 2mrw 2 awl of u !!! THNX 4 helping out at this eleventh hour!!!

So yes i m signing out 4 2day!!!
Pray 4 me!

Especially regards to
Esme
iKhaled
PhyZac
knowitall10
Rutzaba
LMGD33
Alice123
SararaIH
VampBhums
..... n all others! (Excuse me if i missed any1s name here!!!)

Ditto!
Indeed those wonderful human beings deserve to be honored. I thank all of you for being so awesome!

I really wish I would've contributed more, but I had no time on me

Insha'a Allah the exam will be easy and everyone will be happy with their efforts.

 

[Esme]

Esme

When I saw Esme tagged you...
I was like I am so sleepy to solve a question..! But haha, turns out something else.

May Allah s.w.t make your exam easy Aameen.. ( you better sleep now, it is late)

Haha yeah I'm done for today.No more doubts! Just checked XPC before going to bed, some people had doubts so I replied You should get some sleep too.
Sorry for giving you a heart attack lol
Ameen bro. Pray for me please.

 

[19islandprincess96]

ANYONE???

Q 5i) dy/dx = 8 * (1/2)cos(1/2)x - (1/2)sec^2(1/2)x

dy/dx is zero at maximum point.

so

0 = 8 * (1/2)cos(1/2)x - (1/2)sec^2(1/2)x

(1/2)sec^2(1/2)x = 4cos(1/2)x

sec(x) = 1/cosx

so

sec^2(1/2)x = 1/cos^2(1/2)x

1/cos^2(1/2)x = 8 cos(1/2)x

1 = 8 cos^3(1/2)x

cos^3(1/2)x = 1/8

cos(1/2)x = 1/2

(1/2)x = pi/3

x = 2pi/3

 

[19islandprincess96]

ANYONE???

dy/dx = 3cosx - 12cos^2x sinx

3cosx = 12cos^2x sinx

3/12 = cosx sinx

1/4 = 1/2 sin2x

1/2 = sin2x

2x = pi/6 , 5pi/6

x = pi/12 , 5pi/12

Sorry, I cant get 1/2 pi like in the mark scheme...

 

[19islandprincess96]

When they ask for an Argand diagram, do we draw it on the given graph paper or on the answer booklet?

If anyone's awake, please answer...

 

[AlishaK]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s12_qp_32.pdf
Q10 iii) If anyone's wide awake?! knowitall10 xhizors@PhyZac

Thanks a ton in advance.
Jazak Allah Khair.

 

[A star]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w09_qp_61.pdf 5aii

 

[diamona15]

Last minute...but if anyone is free:
http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w12_qp_31.pdf
Q8ii.
thankyou soooooooooooooo much!

 

[abbey789]

question number 3 II part b from may/june 2012, paper 31
PLEASE HELP ME

 

[Alice123]

Thanks for your help n support throughout..I pray for all of u
littlecloud11
PhyZac
Esme
iKhaled
Anika Raisa
Dug
and everyone who helped me n whose name i forgot to mention
Goodluck to all of u!!!

 

[AlishaK]

When they ask for an Argand diagram, do we draw it on the given graph paper or on the answer booklet?

If anyone's awake, please answer...

answer booklet as they only ask u to sketch.

 

[iKhaled]

Thanks for your help n support throughout..I pray for all of u
littlecloud11
PhyZac
Esme
iKhaled
Anika Raisa
Dug
and everyone who helped me n whose name i forgot to mention
Goodluck to all of u!!!

good luck and i hope exam goes easy for all those who studied hard and deserve the grade!

 

[knowitall10]

AlishaK I don't take Maths...I mean, i do, but it's edexcel

 

[jjtheslayer]

Just did Math paper 31 or 32 May/June 2013. Anyone over here that did it?

 

[panoramafolks]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w09_qp_61.pdf 5aii

5 . (a) ii

1st number can be 5 only and rest can be any....

5- - -

1 X 6 X 6 X6 = 216.

 

[LMGD33]

GAAAAAAAHHH It was a normal exam but I didn't have time at all, spent too much on the first six questions and copying from my scratch I completely lost 12 marks T.T I didn't even calculate the mistakes I might have, hope you guys did good!!Inshallah last p3 we ever do.

 

[abbey789]

It was terrible. the most difficult paper ever I must say!

 

[Alice123]

Just did Math paper 31 or 32 May/June 2013. Anyone over here that did it?

the worst paper cie cud make....