Maths, Addmaths and Statistics: Post your doubts here!

[tahatehseen]

Re: O'level Maths, Addmaths and Statistics help available he

guys i am also available for maths and addmaths. feel free to PM me any time!

 

[SalmanPakRocks]

Re: O'level Maths, Addmaths and Statistics help available he

thanks !!

 

[CaptainDanger]

Re: O'level Maths, Addmaths and Statistics help available he

guys i am also available for maths and addmaths. feel free to PM me any time!

Sure....

 

[abcde]

Re: O'level Maths, Addmaths and Statistics help available he

AOA!
I just wanted to confirm whether radian measure is included in the O-level 4024 maths syllabus or not. Thank you!

 

[SalmanPakRocks]

Re: O'level Maths, Addmaths and Statistics help available he

AOA!
I just wanted to confirm whether radian measure is included in the O-level 4024 maths syllabus or not. Thank you!

I think not !! but I will conform from my teacher and then let you know !!

 

[abcde]

Re: O'level Maths, Addmaths and Statistics help available he

Thanks. Do that please.

 

[abcde]

Re: O'level Maths, Addmaths and Statistics help available he

Moreover, can anyone please help me with question 4 (b) of this paper: http://www.xtremepapers.me/CIE/Cambridg ... 2_qp_2.pdf
I was able to solve the question but want to know how one can prove that QR is equal to AQ and AR (so that the triangle is equilateral).

 

[abcde]

Re: O'level Maths, Addmaths and Statistics help available he

And hamidali391, can you please confirm the answer for question 6 (d) of the same paper? Mine are 19/316 and 30/79, respectively. Thanks.

 

[OakMoon!]

Re: O'level Maths, Addmaths and Statistics help available he

Q4.b) Since its a regular hexagon AF=AB, hence, the side of the squares ABPQ and FARS are equal which makes the length of AQ and AR equal too. Which proves that it is atleast an isoceles triangle. Find QAR that is equal to 360-(90+90+120)=360-300=60 which makes the triangle QAR an euilateral triangle. As all the angles are 60 degrees.
Your answers are absolutely correct.

 

[abcde]

Re: O'level Maths, Addmaths and Statistics help available he

Got it! How silly of me to miss this point (the 60* angle one)!

 

[CaptainDanger]

Re: O'level Maths, Addmaths and Statistics help available he

AOA!
I just wanted to confirm whether radian measure is included in the O-level 4024 maths syllabus or not. Thank you!

Its not.... Though our teacher taught us but then again I have never seen a question in the past papers... Its not there in the 2011 syllabus either...

 

[CaptainDanger]

Re: O'level Maths, Addmaths and Statistics help available he

Got it! How silly of me to miss this point (the 60* angle one)!

Happens... Its MATHS...

 

[SalmanPakRocks]

Re: O'level Maths, Addmaths and Statistics help available he

Thanks. Do that please.

nope its is not included !!

 

[abcde]

Re: O'level Maths, Addmaths and Statistics help available he

Okay. Thanks

 

[SalmanPakRocks]

Re: O'level Maths, Addmaths and Statistics help available he

NP

 

[CaptainDanger]

Re: O'level Maths, Addmaths and Statistics help available he

 

[rafae]

Re: O'level Maths, Addmaths and Statistics help available he

The temperatures, in °C, at midnight on 12 consecutive days were
–1, 0, – 4, 1, 2, –2 –1, –3, 1, 2, 3, 2 .

Can someone tell me how to find the median?
The answer is 0.5 . It's a dumb question, but please help me out

 

[CaptainDanger]

Re: O'level Maths, Addmaths and Statistics help available he

Arrange them in the ascending or descending order


-4,-3,-2,-1,-1,0,1,1,2,2,2,3


n/2 n is the amount of number... n+1/2 is used for odd and n/2 is used for even

Here they are even

so

12/2=6th term

Now take 6th and the next (7th) term add them up and again divide by 2

1+0/2=.5

In case of odd after applying n+1/2 the result which comes that term would be the median while in case of even amount you have to use as I explained!
Median is actually the MIDDLE NUMBER..

 

[leosco1995]

Re: O'level Maths, Addmaths and Statistics help available he

Can someone help me with these questions (that came in my Add Maths mock paper)?

Q8. If f(x) = 2x-1 and gf(x) = 12x^2 - 12x + 5

a) find the function g(x)
b) h(x) = ax+b where a and b are positive constants. Find a and b such that fgh(x) = 6x^2 + 12x + 8
c) Express (fgh)^-1 and state the domain and range of (fgh)^-1

Q9. Show that the equation sin^2 x + 3 sin x cos x = 4 cos^2 x can be written as a quadratic equation in terms of tan x.

 

[CaptainDanger]

Re: O'level Maths, Addmaths and Statistics help available he

Will be doing that next year... Help him ppl....