Mathematics: Post your doubts here!

[Hamzeh S]

If you have any questions, just ask.

i was just wondering why 22 not 39 ? i know 180-124-34 but isnt there a theorem that says angles subtended by same arc are equal ?

 

[Fayax555]

i was just wondering why 22 not 39 ? i know 180-124-34 but isnt there a theorem that says angles subtended by same arc are equal ?

You could have applied that method, if 'AB' and 'DO' are parallel, but they are not.

 

[Hamzeh S]

You could have applied that method, if 'AB' and 'DO' are parallel, but they are not.

why is angle DOA 34 ? i know angle at cente is double the one at circumfrence but i thought it only applied to DOC and DBC since they are both formed from the two point D and C

 

[Fayax555]

Angle DOA and DBA, both of them are formed from the two point A and D.

 

[Saket Sekhsaria]

We can see OC and OD are the radius of the circle because they touch its circumference from center, OA does the same so it is also the radius which is 7

Thanks

 

[sa1legend]

any expected questions for on 2013 p2 or 4?

Yes , But don't count too much on it . Transformations on Graphs
Probability diagram , Ratio , % Increase , Triangular area nd the Upper and Lower bound .

 

[Saket Sekhsaria]

Can Anybody do a functions sum like f(x)=g(x) or explain it or something.
Thanks in Advance

 

[shahdigcse]

If 2.00508 = 2.01 ( corrected to 3 sf)

Could 2.00805=2.0 if it is to be corrected to 2 sf ?!

I am confused Need HELP

 

[cheemaboyz]

hey can anyone please help me in how to find whether two events are indenpendent or not ? plz help as soon as possible as tomorrow is my exam thnks.........

 

[architnsk]

guys i have a doubt in may/june 2013 paper 23 ques 19 b(ii) (0580) and can someone give me a link about postion vectors because i srsly need help

 

[shahdigcse]

hey can anyone please help me in how to find whether two events are indenpendent or not ? plz help as soon as possible as tomorrow is my exam thnks.........

Two events are independent if the occurrence of one event is unaffected by the occurrence of the other. The AND rule:
p(A and B) =p(A) * p(B)
where p(A)= probability of A occurring
p(B)= probability of B occurring

(THIS IS COPIED FROM THE MATH FORMULA BOOK)

So when they say (AND) it is independent & u need to multiply the probabilities.

 

[cheemaboyz]

Two events are independent if the occurrence of one event is unaffected by the occurrence of the other. The AND rule:
p(A and B) =p(A) * p(B)
where p(A)= probability of A occurring
p(B)= probability of B occurring

(THIS IS COPIED FROM THE MATH FORMULA BOOK)

So when they say (AND) it is independent & u need to multiply the probabilities.

but in some questions they say state whether a event is independent or dependent and we have to show the whole working as well so what to do in those answers as u cannot say that there is and in between so it is independent............

 

[shahdigcse]

but in some questions they say state whether a event is independent or dependent and we have to show the whole working as well so what to do in those answers as u cannot say that there is and in between so it is independent............

Amm I don't really understand what you mean :/ .... I hope someone else would help you

 

[snailey]

Good luck to everyone appearing for tomorrow's math test
Do well and lets have a good discussion on the answers tomorrow! haha

 

[Fayax555]

Good luck to everyone appearing for tomorrow's math test
Do well and lets have a good discussion on the answers tomorrow! haha

Hi, snailey. It is not allowed in XPC to discuss a paper within 24 hours of it taking place.

 

[snailey]

Hi, snailey. It is not allowed in XPC to discuss a paper within 24 hours of it taking place.

Ooh okayy cool. Thanks for the info!

 

[Lady Lyy]

Hi, can anyone please help me how to find the answer for May/June 2004 Paper 2 0580, question number 20) b) ii) ?

Thanks!

 

[***amd***]

Hi, can anyone please help me how to find the answer for May/June 2004 Paper 2 0580, question number 20) b) ii) ?

Thanks!

link plz

 

[Lady Lyy]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s04_qp_2.pdf here

 

[snailey]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s04_qp_2.pdf here

See, one easy way to solve these type of questions is to first find out the half of the middle value.

For example im this case x^2-6x+10
half of 6 will be so (x-3)^2
now when you expand this you get x^2-3x-3x+9.
So now to get to the given question you have to add 1.
So p is 3 and q is 1.