Mathematics: Post your doubts here!

[gary221]

Rutzaba... sorry 4 disturbing... ... bt i need help!!!
http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_s07_ms_3.pdf
http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_s07_qp_3.pdf

ques 1... pls!!
thnx!!

 

[GorgeousEyes]

please june08 no.8 .

 

[PANDA-]

Less than 36 hours left for exam time.

 

[Amaryllis]

can anyone please help me http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s11_qp_12.pdf Q 9 i

and Q 5 i and q 7 part i http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_w08_qp_1.pdf

 

[shafayat]

can anyone please help me http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s11_qp_12.pdf Q 9 i

and Q 5 i and q 7 part i http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_w08_qp_1.pdf

for q 9 i ..
U can quickly sketch a graph or easier method is you make a table and substitute x values for y values !! The then write
Smaller value<X<larger value
In the table use values like 0,45,90,135,180 , if u want and have time u can do till 360 degrees also

 

[shafayat]

and please in nov11 #2 how do i know the number of roots for the equation without drawing the graph? http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w11_qp_11.pdf

For the first part you HAVE to sketch .. The. State the number of solutions .. Let's say 2
So then you check the other question it says upto 20pie but u have till 0-2pie .. So u consider o-2pie as one revolution and then count number of revolutions u need .. Till 20 pie it will be around 10 maybe .. And u have for one resolution 2 solutions so for 10 resolutions .. Just multiply

 

[shafayat]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w11_qp_11.pdf #11 how do i know the range? I got it Y>or equal 2 , but how do i know it's less than or equal to 10?

This is simple ..
Just substitute both the domain .. Write in this format
Smaller value<f(X)<larger value

 

[Muhammad Arham Ayaz Malik]

Maths is easy guys , what you have prepared by own its good
Dont study one day before
Take a chill pill enjoy the time , dont take tension else trust me
You will ruin your grade

 

[Manobilly]

A day left!

 

[Manobilly]

Good Luck every1

 

[daredevil]

daredevil , MustafaMotani thanks boys

no problemo butt ummm *ahem ahem not a boy ahe ahem*

 

[daredevil]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s10_qp_12.pdf

plz solve q11 part v and see if u get the correct answer...
I get it until the sin^-1(1/3) but after that i think the value in the ms is wrong :O

 

[daredevil]

http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_w08_qp_1.pdf

i'm not getting the correct answer for Q 5 :O

 

[daredevil]

http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_s09_qp_1.pdf

Q 5.... why is it R2 = ½r ² (π + 1)
why π + 1 ??

http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_s09_ms_1.pdf

Q 10 why is it -5 ??? -__-

 

[daredevil]

MustafaMotani syed1995 A star asd
plz see my problems and answer them ^_^

 

[surinr]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s10_qp_31.pdf
help with question 9 please

 

[A star]

no problemo butt ummm *ahem ahem not a boy ahe ahem*

see the he proved my point . i am not alone in this world xD

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w08_qp_1.pdf

i'm not getting the correct answer for Q 5 :O

the whole question here goes
5i) -2=a-bcos(0r 360) cause in inverted graph ) 0 or 360 whould have lowest value
10=a-bcos(180) now solve them simultaneously
5ii) a-bcos(x) = 0 solve it by sub the values of a and b found in first part

5iii) well draw the graph it will be a inverted graph of cos translated a times with amplitude of b i guess

 

[Magenta]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s09_qp_1.pdf

Q 5.... why is it R2 = ½r ² (π + 1)
why π + 1 ??

The angle of the bigger sector is 2π - (angle of smaller sector) and the angle of smaller sector is π-1 so
2π-(π-1) = 2π-π+1 = π+1

 

[A star]

The angle of the bigger sector is 2π - (angle of smaller sector) and the angle of smaller sector is π-1 so
2π-(π-1) = 2π-π+1 = π+1

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s09_qp_1.pdf

Q 5.... why is it R2 = ½r ² (π + 1)
why π + 1 ??

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s09_ms_1.pdf

Q 10 why is it -5 ??? -__-

use the easier aproach of area of circle - R1 it would save time as it is straight forward

 

[daredevil]

Thanku Magenta and A star
those were pretty simple actually I guess its just the last minute stress taking the toll on me never mind -_-
and hahah yeah A star I was thinking the same thing lolx My avatar did it again xD