Mathematics: Post your doubts here!

[Tanvir Azad]

put DY/DX =0 then solve this and curve equation simultaneously

ok... i got it.. Thanks

 

[Heyyy]

let u^2 =x
that means dx/du =2u that means differentiating u^2 woth respect to u
dx= 2u du
next thing is to change limits...
if u^2 =x
when upper limit of x=p^2 then replace x with p^2
u^2 = p^2
new upper limit =p
and since o will remain o
the new limits are p and o

then u have to integrate cos of root of u^2
root will cut the sqr u will get
integral of cos u dx
now look at the third line of this solution u will find dx= 2u du
integral of cosu 2u du for the limit p and 0
integrating by parts
u= 2u dv= cos u
u'=2 v= sinu
2u sin u- integral of 2sin u
2usinu -( -2cosu)
2usinu + 2cos u... apply limits p and 0
2p sinp + 2cosp - ( o +2 cos0)
2psin p +2cosp -2(1)=1 as this is also equal to the area of the shaded region...
2p sinp= 3-2cosp
sinp= 3-2cosp / 2p

Thanks A lot!!!
I wasn't integrating it by parts :/
Anyways,thanks again

 

[A star]

guys is 2012 and 2011 all variants enough to know how much is your prep :S

 

[Rutzaba]

guys is 2012 and 2011 all variants enough to know how much is your prep :S

wont u be solving all the pprs?

 

[A star]

wont u be solving all the pprs?

i already have solved 2002 -2009 before 1st of may

 

[ZaqZainab]

i already have solved 2002 -2009 before 1st of may

Hi-5

 

[Rutzaba]

hmm phir pych kia rhe ho?

 

[A star]

hmm phir pych kia rhe ho?

yar i said i solved them i didnt say succesfully to many errors and problems

 

[Rutzaba]

Part 5 ii again Rutzaba (sorry for tagging, but due to quick response I am really really really glad)
Yess More prayers coming!View attachment 42627

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

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_ms_31.pdf

Can anyone explain to me wat the ms is saying for Q10 part iv??! >.<
these cie people cud try making a marking scheme when they are not drunk for a change >_<

this doesnt make any sense

I got the answer 0.906 but all these other values given in the ms seem to b mumbo jumbo to me

hogaye ye wale or shall i do em?

 

[Rutzaba]

Thanks A lot!!!
I wasn't integrating it by parts :/
Anyways,thanks again

pray in return

 

[daredevil]

hogaye ye wale or shall i do em?

ummm do it ^__^
thanks in advance ^__^

 

[Ayeshak93]

Q9 b part is giving me a headache...Please help!

 

[Lostsoul]

Kardo pls

 

[saqib.tariq]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_S08_qp_01.pdf

question number 8 all ?????

 

[A*(a*)]

hmm phir pych kia rhe ho?

Can you please solve the (ii)b ? Its N10/33 Q8

 

[A*(a*)]

pray in return

And also,

its the same year, Q10. I cant solve (ii)b

 

[saqib.tariq]

how the gradient of AC is -1/2 plz help

 

[Ayeshak93]

Q. 10 part 2

 

[Ayeshak93]

Q5

 

[Haya Ahmed]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s13_qp_62.pdf

Q6 part (iii) .. can someone explain and clear my doubt please

what is the difference if we did all together and then subtract it from 12!
or we put them as 8 Items next to each other and we have 9 places to place each H tree .. so 9P4 x 8!
Please someone explain me ASAP thanks !