Maths, Addmaths and Statistics: Post your doubts here!

[Dark Destination]

How to find stretch factor? And invariant line? :/

 

[asadalam]

Anyway - Rs.50 per answer right now.
One Zinger = One hour of answers.
Naan Kabab Tikkay = 2 hours.

Thats asadalam. I help in free

Yahan par koi faqa nai para hoa aur na hi mai bhoka mar ra hoon,k inki zaroorat paray I'm just tired of typing,ek sawal hal karo to teen aur ajate hain :/

 

[asadalam]

How to find stretch factor? And invariant line? :/

By trial and error.Look for the line where ratio of image point/object point is constant and then see what that ratio is.

 

[Awesome12]

You go home and rest. We'll eat zingers and naan kabab and solve papers ourselves.

You are really mean

Yahan par koi faqa nai para hoa aur na hi mai bhoka mar ra hoon,k inki zaroorat paray I'm just tired of typing,ek sawal hal karo to teen aur ajate hain :/

lol
Hey what is the hardest paper that you have come across?

 

[asadalam]

see what i mean,i type out an answer another question comes automatically and i cant even scroll up to check my alerts

 

[Dark Destination]

By trial and error.Look for the line where ratio of image point/object point is constant and then see what that ratio is.

Seriously? There is no other way? :/
And what about stretch factor?

Btw, when you rotate, do you draw lines, and measure a 90 degree angle? or do you just do it without it?
Are those lines and stuff needed on the diagram?

 

[asadalam]

You are really mean

lol
Hey what is the hardest paper that you have come across?

There is no single hardest,older ones seem a bit tricky due to syllabus changes and whatnot but in every paper there are at least 1 or 2 1 mark qs that require real mathematical skills.Rest are easy in P1.

 

[exploded diper]

Long-lost brother I remember that Nick TV show Drake & Josh

yeah i be drake..

 

[Dark Destination]

Stretch Factor = Dist. of Image from Inv Line / Dist. of Object from Inv. Line

Ofc, i know that formula. But when they give object and image, and don't tell anything else. How do we find invariant line and s.f?

 

[asadalam]

Seriously? There is no other way? :/
And what about stretch factor?

Btw, when you rotate, do you draw lines, and measure a 90 degree angle? or do you just do it without it?
Are those lines and stuff needed on the diagram?

That ratio is the stretch factor.And i usually rotate using my instincts though i will draw a line in finals to make sure and indicate that i know rotation....

 

[Awesome12]

There is no single hardest,older ones seem a bit tricky due to syllabus changes and whatnot but in every paper there are at least 1 or 2 1 mark qs that require real mathematical skills.Rest are easy in P1.

Oh come on any paper which was abnormally difficult than the others. Now dont drift back to the 90 or 80s because I don't have those papers

 

[asadalam]

Ofc, i know that formula. But when they give object and image, and don't tell anything else. How do we find invariant line and s.f?

This helped me understand shear and stretch very clearly

 

[funky brat]

Guys how exactly do you rotate an object? Someone please?

 

[asadalam]

Oh come on any paper which was abnormally difficult than the others. Now dont drift back to the 90 or 80s because I don't have those papers

Pata nai yar,i dont keep a checklist of tricky Qs or such,just keep on doing,no paper is much more difficult then others.

 

[Dark Destination]

That ratio is the stretch factor.And i usually rotate using my instincts though i will draw a line in finals to make sure and indicate that i know rotation....

But seriously? I've been doing it without lines, all along.
Even find Center of rotation with my instincts. .-.

What lines are required? Arcs? For the p.bisector?

 

[Awesome12]

2012 Solved paper

http://www.mediafire.com/download/1weld6d3makpbl6/2012+Math+Paper.zip

 

[asadalam]

Guys how exactly do you rotate a picture? Someone please?

Place a compass pointy end on the center of rotation,measure distance to object and rotate and see if it matches a coordinate point right on the point and then see by my eyes if its the required angle.

 

[asadalam]

asadalam what other transformation notes you got? Can u post all ? (Except this shear and stretch and that transformation matrix one)

I've posted these many times.....

 

[Dark Destination]

Oh come on any paper which was abnormally difficult than the others. Now dont drift back to the 90 or 80s because I don't have those papers

That exterior angle in terms of p was tricky though. Did you do that in first try?

 

[era30amy]

Distinction is yours, sire. :'P