Qualification > Math
IGCSE MATHS Doubts
Vin:
i think its oct/nov 2009 .. tht ques is still buggin me .. >:(
Falken_07:
--- Quote from: ~VIN1094~ on May 15, 2010, 07:42:50 am ---always feel free to ask anytime !! By the way wat other subjects do u take ??
--- End quote ---
Well, I'm also taking biology, chemistry, physics, computer studies, economics and EFL
(I also take examination for my native language, but its already conducted last November)
And also thanks for showing the list of the matrices for the transformation, though maybe I'll just stick to the old method :)
mdwael:
--- Quote from: the golden girl on May 15, 2010, 11:25:33 am ---which year?
--- End quote ---
Yes its oct/nov 2009 sorry I forget to mention the year
Ghost Of Highbury:
--- Quote from: mdwael on May 15, 2010, 11:23:54 am ---Hey guys im preparing for P4 maths which to come in a few days and Ive been solving p4 oct/nov and there is a question I dont quite understand and I'd really appreciate your help.
It is question 2 on page 5 (iv) part, its about transformations and tells me to describe triangle U onto triangle X and I know its shear , y axis invariant, but the shear factor is -1, not 1 as I though, can someone please describe me how to know when the shear value is negative? thanks for your help in advance :)
--- End quote ---
w09, paper 4, 2)iv
ok this negative shear factor thingy is horrible..i cant figure it out y the move upwards is considered negative.
anyhow, its always wiser to use the matrix method
take two object and correspoding image co-ordinates..
(-4,1) --> (-4,5)
(-1,1) --> (-1,2)
check the image attached
a shear transformation matrix with y-axis is invariant is = (1 0)
(k 1)
here k = -1
Baladya:
http://www.freeexampapers.us/IGCSE/Maths/CIE/2007%20Jun/0580_s07_qp_4.pdf
4)e)ii) I managed to do (i) but how can we do this?
Thanks :)
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