Mathematics: Post your doubts here!

[Mahmood Magdy]

Hello !! I have a 2 sequence questions !
1) I need to find the formula of both
20,17,13,8

7,5,3,1
plz answer asap

 

[Fahim Abdullah]

http://i.imgur.com/Y9BBoEm.jpg

http://i.imgur.com/qSYq288.jpg

http://i.imgur.com/jak6VzZ.jpg

Why is the first one 9.5 for mid internal value? Why not 10? And if it's like that then how come next one is 1.85? Just add lower upper bounds and divide by 2 now but not earlier?

 

[Drbrilliant]

Having doubt in maths 2012 paper variant 42 0580. Question number 2b.

 

[Counter Logic Gamer]

Brother, it would be kind of you to give me notes on Bearing(Maths)

 

[Hamzeh S]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w11_qp_41.pdf
Question 4 A i dont really get it i managed to solve all parts except A :/

 

[Zuhsid]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w11_qp_41.pdf
Question 4 A i dont really get it i managed to solve all parts except A :/

Take it as 2 similar cones, one(20cm of height) with a radius of r, and teh other(12cm of height) with a radius of 2.7....
Therefor, take the ratio of the sides:

r : 2.7
20 : 12

Therefor
r/20 = 2.7/12
r= 20 x (2.7/12)

 

[Saket Sekhsaria]

Guys Question no 23 in this paper. Can someone also please explain how to do it.

 

[Iridescent]

Guys Question no 23 in this paper. Can someone also please explain how to do it.

Since you have AB and BE, find AE by Pythogoras Theorem. Once you have AE and AC (already given in the question), find angle CEA by trigonometric ratio. It will be: Tan CEA = AC/EA.

 

[Saket Sekhsaria]

Since you have AB and BE, find AE by Pythogoras Theorem. Once you have AE and AC (already given in the question), find angle CEA by trigonometric ratio. It will be: Tan CEA = AC/EA.

Thanks

 

[Iridescent]

Thanks

You're welcome.

 

[Hamzeh S]

Take it as 2 similar cones, one(20cm of height) with a radius of r, and teh other(12cm of height) with a radius of 2.7....
Therefor, take the ratio of the sides:

r : 2.7
20 : 12

Therefor
r/20 = 2.7/12
r= 20 x (2.7/12)

how did u know they are similiar?

 

[Zuhsid]

how did u know they are similiar?

Because they are parts of the same singular cone......!!

 

[Nagaanusan]

can i get 2013 m/j paper

 

[Zuhsid]

https://www.xtremepapers.com/commun...emes-grade-thresholds-examiner-reports.28829/

 

[Mahmood Magdy]

Hello !! I have a 2 sequence questions !
1) I need to find the formula of both
20,17,13,8

7,5,3,1
plz answer asap

 

[Zain Mahmood]

Assalamoalaikum!! everyone any tips for igcse mathematics ? Your help will be appreciated

 

[Iridescent]

Assalamoalaikum!! everyone any tips for igcse mathematics ? Your help will be appreciated

Maths, basically, needs practice.
IGCSE Mathematics is an easy subject, one where you can easily score an A*/A. Cover your syllabus from the books and clear all your doubts with your teacher. Practice as much as you can. Solve at least 10 years of past papers, and you will definitely end up with a good grade.

 

[Unicorn_guy]

umm hey there..well i have some doubts in transformation and matrix transformations.So can you explain me those two?it would be great

 

[azmath]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s12_qp_22.pdf
please help with q: 17c, 18 a and 19th .jazakallahkhair.

 

[Counter Logic Gamer]

Gys can anyone gv me notes on Bearings ans Statis tics!!