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# Fp1 Watch

1. http://mathsathawthorn.pbworks.com/f/FP1Jan07.pdf
Q8b? So ive done part a! We've never been taught part b? How would i start it?
2. Well ive got x'=costhetax-sinthetay+h
and y'=sinthetax+costhetay+k
3. (Original post by Ayaz789)
Well ive got x'=costhetax-sinthetay+h
and y'=sinthetax+costhetay+k
Well you can use the brute force approach - write down the 4 equations that arise from the transfromation of the two points, and solve - not too diffiuclt, I think.

OR, you can think about the problem.
As a hint, consider the line connecting the two given points, and the translation of that line under T. What properties of the line change and how?
4. (Original post by ghostwalker)
Well you can use the brute force approach - write down the 4 equations that arise from the transfromation of the two points, and solve - not too diffiuclt, I think.

OR, you can think about the problem.
As a hint, consider the line connecting the two given points, and the translation of that line under T. What properties of the line change and how?
Whats the brute force approach? The thing is idk how to get the equation of the 4 lines?
5. (Original post by Ayaz789)
Whats the brute force approach? The thing is idk how to get the equation of the 4 lines?
In post #2 you have the transformation equations.

So, you just need to plug in the points you've been given to get 4 equations.
(x,y) = (0,1) and (x',y') = (1,2) for the first couple of equations. Etc.
6. (Original post by ghostwalker)
In post #2 you have the transformation equations.

So, you just need to plug in the points you've been given to get 4 equations.
(x,y) = (0,1) and (x',y' = (1,2) for the first couple of equations. Etc.
Oh okay thanks! Top man , ill have a go at it , if i cant do it then ill come back

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