MAT - Paper 2012 - Q5
Flashcards
What is the formula for $(x _ n, y _ n)$ rotated $90^{\circ}$ anticlockwise about the origin?
\[(-y _ n, x _ n)\]
What is the formula for $(x _ n, y _ n)$ rotated $90^{\circ}$ clockwise about the origin?
\[(y _ n, -x _ n)\]
If you have some intuitive feeling about some sort of transformation being a similar transformation applied more than once, how could you formalise it?
Using vectors.