Qualification > Math
IGCSE MATHS Doubts
Choc.Kits:
hey guys, my method for the matrices is that i make them up on the paper. as in, i use the identity matrix, [1 0,0 1]. plot those points on the grid, so points (1,0) and (0, 1). then i use whatever transformation matrix i need on them, so e.g. if im trying ot find the matrix of reflecting on the line y=x, i actually reflect them.
then i see the new co-ordinates. so if (1,0) became (0,1) and (0,1) became (1,0) my matrix for that transformation would be [0 1, 1 0]
im not sure if u can understand by that... but yea :P
Vin:
this might help ..
https://studentforums.biz/index.php/topic,5575.msg167872.html#msg167872
our friend A@di has made life easy for us .. but i cant memorise them !!
$H00t!N& $t@r:
--- Quote from: ~VIN1094~ on May 15, 2010, 10:48:13 am ---but i cant memorise them !!
--- End quote ---
lol i know what you mean! :D But i guess it's helpful to memorise it cz you'll just be wasting time on a question worth 2 marks! but if you're fast enough then it shouldnt be a problem... as for me im quite slow.. so yea. Nyway i started learning it like a month ago so i know them all now.
mdwael:
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 :)
The Golden Girl =D:
--- 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 ---
which year?
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