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IGCSE MATHS Doubts

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Adzel:

--- Quote from: Adzel on May 18, 2010, 04:19:51 pm ---same paper VIN Q4 part (f), Q5 part (b) + explaination...please  :)

--- End quote ---

Vin:

imma hav my dinner till then try

https://studentforums.biz/index.php/topic,5575.msg167872.html#msg167872

aadi's made our lives easier ..

$H00t!N& $t@r:
@VIN i think u made a mistake in answering q3b in the O/N 2004 ppr. the final answer is 6hours 51min cz when u convert 6.857638889 into hours and min you get 6 hours 51 min. the working is right tho. its just the final answer (the conversion)

Vin:

yea sorry .. typo thanks =)

Ghost Of Highbury:

--- Quote from: Adzel on May 18, 2010, 04:19:51 pm ---same paper A@di Q4 part (f), Q5 part (b) + explaination...please  :)

--- End quote ---

4f) check the link given by VN to see the list. check the transformation matrix for stretch with y-axis invariant

(2 2) * (1.5 0)  = (3 2)
(5 2)    (0    1)    (7.5 2)

(2,2) --> (3,2)

(5,2) --> (7.5,2)

do the same with the last set of co-ordinate ..to get the image co-ordinates as (7.5,4)

ii) v already hav used it

   (1.5 0)
   (0   1)

5b)i) p is AO (check diagram)

    ACO is 51 degree, alternate interior to NAC.
  
    70/sin 90 = p/sin51

   p = 70sin51 = 54.4

bii) =

    q^2 = 70^2 - 54.4^2 = 1940.64

     q = 44.1

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