Mathematics: Post your doubts here!

[we will do it]

can anyone tell me that for p2 maths paper 22 what was the answer for scale questionn

 

[bluefa1con]

Check this --> http://www.nku.edu/~mathed/Alphabet.pdf
It's got proof that O has 2 lines of symmetry and rational order 2

a circle has infinite symmetry
u cut it from diameter u get the same image on both sides

there you go
http://wiki.answers.com/Q/How_many_lines_of_symmetry_does_letter_'O'_have
http://answers.yahoo.com/question/index?qid=20090107160413AAZJAuK
http://www.schools.ash.org.au/stkierans-manly/Classes/Yr6/6B/Symmetry/16.htm

these would be enough for your reference

 

[Amir Tosson]

a circle has infinite symmetry
u cut it from diameter u get the same image on both sides

there you go
http://wiki.answers.com/Q/How_many_lines_of_symmetry_does_letter_'O'_have
http://answers.yahoo.com/question/index?qid=20090107160413AAZJAuK
http://www.schools.ash.org.au/stkierans-manly/Classes/Yr6/6B/Symmetry/16.htm

these would be enough for your reference

Yea I know this, but I'm saying that the letter O is not a circle, it's an oval. If you look at it from a 90 degree view it won't be the same shape.
Nevermind anyway

 

[joulie]

just learn the matrices of transformation and such( characteristics of transformations), u will be fine, there is a specific technique i use for memorising the matrices. make sure ur graphs are accurate by not making huge points, double checking the lines, etc

so what is ur technique for memorising the matrix

 

[beewhiz997]

so what is ur technique for memorising the matrix

its really long, i can email you? or pm

 

[joulie]

ok
but that stretch matrix is really confusing me
because in the exam it came like u said but other places like here http://www.cimt.plymouth.ac.uk/projects/mepres/alevel/fpure_ch9.pdf
says its the opposite

 

[beewhiz997]

can anyone tell me that for p2 maths paper 22 what was the answer for scale questionn

it was 13500 and 408

 

[beewhiz997]

ok
but that stretch matrix is really confusing me
because in the exam it came like u said but other places like here http://www.cimt.plymouth.ac.uk/projects/mepres/alevel/fpure_ch9.pdf
says its the opposite

ok so give me your email

 

[Hasan Saimeh]

The 2nd question in the exam,
the lines of symmetry question was: I and O
and the order of symmetry was I, O and N.. PLEASE SAY RIGHT!! :'(

Nop wrong

the first is I

second is N and I

 

[joulie]

[email protected]

 

[joulie]

if ur busy now u can send it later maybe tomorrow

 

[beewhiz997]

if ur busy now u can send it later maybe tomorrow

i sent it just check ur email

 

[Amir Tosson]

(1 k) <--- this was the matrix form in the shear, right?
(0 1)

 

[beewhiz997]

(1 k) <--- this was the matrix form in the shear, right?
(0 1)

(1 0 is what i got :/
k 1)

 

[Amir Tosson]

(1 0 is what i got :/
k 1)

Whyy??? The shear is parallel to x-axis

 

[beewhiz997]

Whyy??? The shear is parallel to x-axis

so doesnt that mean its Y AXIS invariant?

 

[Amir Tosson]

so doesnt that mean its Y AXIS invariant?

Noo, in shear: if it's parallel to x-axis it's x-axis invariant.. if it's parallel to y-axis then y-axis is invariant
check this : http://www.scribd.com/doc/39052412/Shear-and-Stretch

 

[beewhiz997]

Noo, in shear: if it's parallel to x-axis it's x-axis invariant.. if it's parallel to y-axis then y-axis is invariant
check this : http://www.scribd.com/doc/39052412/Shear-and-Stretch

awww man but my teacher said dat??

 

[Amir Tosson]

awww man but my teacher said dat??

My teacher said the same thing!!
but I don't think it's right.

 

[beewhiz997]

My teacher said the same thing!!
but I don't think it's right.

oh well