Maths, Addmaths and Statistics: Post your doubts here!

[snowbrood]

well FEB is 90

I dont think the diagram is up to the standards doesnt FEB in it look like 90 !

 

[tania]

well FEB is 90

I am having problem with vectors and graph of functions...cn any1 help??plzz

 

[snowbrood]

i could help with vectors

 

[snowbrood]

I am having problem with vectors and graph of functions...cn any1 help??plzz

post your question girl i will try to solve

 

[tania]

post your question girl i will try to solve

ummmm the whole topic is quite confusing:/

 

[scouserlfc]

LOL ! ! ! !
try looking on websites like mathisfun and search on google for GCSE Vectors or Vectors in two dimensions !

 

[Monojit Saha]

Can anyone please tell me how to find the direction of a vector in a relative velocity sum>???--

Its very confusing!!!

 

[ppaayas]

Post a pic of a question about your problem.

 

[scouserlfc]

its pretty easy find the direction according to the north direction u will see a horizontal or a vertical in ur vector diagram according to it find the angle and + and - with the angles ! !

 

[beacon_of_light]

http://www.xtremepapers.com/CIE/Cambridge O Levels/4024 - Mathematics/4024_w10_qp_12.pdf

Could anyone explain to me Q4 (b) and Q24 (biii)

 

[XPFMember]

As-salam-o-alaikum!

Well for Q:4

within 2.5 ....find the lowest and max value

1 + 2.5 = 3.5

1 - 2.5 = -1.5

so no. of temp between -1.5 and 3.5 = => 6

 

[beacon_of_light]

Thank you xpf member!
Wat about q24?

 

[CaptainDanger]

Thank you xpf member!
Wat about q24?

I remember him (XPFMember) helping me for that temperature question... Here : http://www.xtremepapers.com/community/threads/help-a-question-in-oct-nov-2010-maths-paper.4169/
Anyway :

Q24 (biii)

Do it using similarity...

3p/p=q/kq

k=1/3

 

[Monojit Saha]

http://www.xtremepapers.com/CIE/Cambridge O Levels/4024 - Mathematics/4024_w10_qp_12.pdf

Could anyone explain to me Q4 (b) and Q24 (biii)

for Q4,, iam a bit confused because it is written '2.5c of 1c',, so does that refer to 2.5/1 and in that case the answer is o.4 and the number of temperatures within that range is also 6!!!!

 

[leosco1995]

Within 2.5 C of 1 C means that the temperature should be within the following ranges:

- 1 + 2.5, i.e. from 1 - 3.5 C.
- 1 - 2.5, i.e. from -1.5 - 1 C.

The temperatures that meet either of those requirements are 1, 0, -1, 1, 3 and -1. So the answer is 6.

 

[snowbrood]

help me guys

 

[abcde]

help me guys

I believe 'theta' has to be given.

 

[snowbrood]

same here buddy it should have been but it is not given u may have seen this question in D3 mensuration ex12b Q.4

 

[Nibz]

If it's not, then Circumference = 2πr
88 = 2πr
r = 44/π

Now arc length = r x theta
ACB = 44/π x theta => 44theta/π

 

[snowbrood]

in case if the book provided the theta then there was no apparent reason to post such a useless question.. however i did got 14 as radius