Qualification > Math
IGCSE MATHS DOUBTS HERE !!!!
NotAbod:
Solve 2011 41, 42, 43.
some good questions are there.
Star xD:
I have a problem in transformations using matrices.
That is, I don't understand the I & J thing, in which we are supposed to find the matrix that shows a particular transformation.
I had no choice, so I mugged up the matrices, but am still confused if something comes that I haven't done.
I would really appreciate if someone could explain to me how to find the matrix of a particular transformation.
Also, the difference between a shear, & stretch.
NotAbod:
I and J is hard, the only way is to learn them
for shear and stretch, check attachments
Star xD:
Alright..
Thanks for the notes.
I had a doubt in Enlargement :
in my school I was taught that the co-ordinates for an enlarged object can be found by multiplying the distance of all the points of the object & the centre with the scale factor & then moving those many spaces from the centre. But on GCSE Bitesize, its just mentioned that we can just multiply the co-ordinates of the object with the scale factor to get the co-ordinates of the image. Is this only true when the centre is (0,0) or otherwise too?
NotAbod:
I use the first method, never tried the other one.
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