Matrices Flashcards
1
Q
Reflection in the x-axis
A
(1 0)
(0 -1)
2
Q
Reflection in the y-axis
A
(-1 0)
(0 1)
3
Q
Reflection in the line y=x
A
(0 1)
(1 0)
4
Q
Enlargement by a scale factor of “a” with centre (0,0)
A
(a 0)
(0 a)
5
Q
Rotation
A
(a -b)
(b a)
6
Q
Identity Matrix
A
(1 0)
(0 1)
7
Q
Rotation 90 anticlockwise
A
(0 -1)
(1 0)
8
Q
Rotation 180 anticlockwise
A
(-1 0)
(0 -1)
9
Q
Rotation 270 anticlockwise
A
(0 1)
(-1 0)
10
Q
Rotation in terms of cos and sin
A
(cosθ -sinθ)
(sinθ cosθ)
