Mathematics: Post your doubts here!

[XPFMember]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

midpoint formula is right but gradient is the other way round=> (y2-y1)/(x2-x1)
Then u have eqn of line=>y=mx+C,
gradient of perpendicular line=>m2 =-1/m,
eqn. m= tan 0 =>where 0 is the angle the line makes with the x axis!,
then gradient of parallel lines are same!
This is what i remember now....enough??If u need more...tell me

 

[jazzangel16]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

Du we need to know the formula to find TSA and LSA.. or would it be given?

 

[XPFMember]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

oh yeah i had to tell u one thing regarding it....so whenever u r given to find the TSA u always add the aareas of all the sides u can see...dont simply put the formula for cylinder or cone or whatever...use ur common sense....only then wud u get it right
And no it's normally not given!!

 

[jazzangel16]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

Common sense is not there.. Thats the biggest problem hehe

 

[mimmi]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

Find the area! i dont know how to do this

 

[jazzangel16]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

Find the area! i dont know how to do this

Use the formula 1/2 ab sin C
a= 3
b=2
c=20

 

[XPFMember]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

yeah jazzangel is right!!thanks for answering!!

 

[mimmi]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

OMG i totally forgot thanks ^_^

i just finished my remaining questions on my huge revision O_O'

 

[mimmi]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

also the formula for finding the angles in a polygon is?

 

[XPFMember]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

sum of angles in polygon is (n - 2)180 , where is the no. of sides!
To find each exterior angle in a REGULAR POLYGON => 360/n
To find each interior angle of REGULAR POLYGIN => [(n - 2)180]/n

let me know if u need more!!

 

[jazzangel16]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

http://www.xtremepapers.net/CIE/Cambrid ... 4_qp_2.pdf

Please tell me how to find the answer for 18 B

What I did was I found the angle using Tan rule.. and the ans was 48.02
Then 90 - that ans..

This method is wrong right!

 

[mimmi]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

http://www.xtremepapers.net/CIE/Cambridge%20IGCSE/0580%20-%20Mathematics/0580_s04_qp_2.pdf

Please tell me how to find the answer for 18 B

What I did was I found the angle using Tan rule.. and the ans was 48.02
Then 90 - that ans..

This method is wrong right!

correct!

 

[jazzangel16]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

http://www.xtremepapers.net/CIE/Cambrid ... 6_qp_2.pdf

Question number 23 please

 

[abcde]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

AOA math angel! You should continue giving tips topic by topic. That would be very helpful !
Thank you

 

[Vai]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

Hey.
I needed to clarify something!
We've 3 different variants. And one variant is harder than the other. So, isn't it unfair? Do we get our grade thresholds according to each zone or is it overall, including the other zone's papers too?

 

[shadogard]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

Hi Everyone!...
Could you guys tell me which topics do i have to mostly concentrate on paper 2 extended? Really appreciate your help

Thanks
Regs

 

[XPFMember]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

Hey.
I needed to clarify something!
We've 3 different variants. And one variant is harder than the other. So, isn't it unfair? Do we get our grade thresholds according to each zone or is it overall, including the other zone's papers too?

Actually all the varoants are set of same difficulty level!!
By the way the threshold are seperate for each varient!!

AOA math angel! You should continue giving tips topic by topic. That would be very helpful !
Thank you

Waalaikumassalam!! Actually I am currently doing my A levels...actually just started AS!!So i'm busy with them and it isn't possible for me to give tips for all topics...At the most what i can do is help u with the topics or questions u need help!! hope u understand

http://www.xtremepapers.net/CIE/Cambridge%20IGCSE/0580%20-%20Mathematics/0580_s06_qp_2.pdf

Question number 23 please

U have to draw parallel lines and find out the route to that in terms of a and b ...u'll brobably get zigzag lines!!

 

[abcde]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

I totally understand ! I'll ask you when i get stuck somewhere

 

[XPFMember]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

@abcde: yeah y not...i'll be glad to help anyone

 

[Leone]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

:?: Can anyone please tell which topics are most likely to come for Paper 2 as shadogard has asked??? Are there any topics which will for sure come or any which are only for Paper 2??? If there are any let me know... What are most likely to come anyway??? Please hurry!!! :?: