Originally Posted by
dellatorre Looking for help with a problem I'm working on:
"Show that matrix
[0 -1 0]
[-1 0 0]
[0 0 1]
for a reflection about line y=-x
is equivalent to a reflection relative to the y axis followed by a counter-clockwise rotation of 90 degrees."
So for my answer, first I have for the reflection relative to the y axis, I have the matrix:
[-1 0 0]
[0 1 0]
[0 0 1]
and for the counter-clockwise rotation of 90 degrees, I have the matrix:
[0 -1 0]
[1 0 0]
[0 0 1]
but then I don't know what my next step should be.
Can anyone help me with this?
thanks,
Della