is there a metod to find a matrix for rotaton or reflection ode than simultaneous???
the matrix for reflection in line y=x is 0 1
1 0
the matrix for refection in line y=-x is 0 -1
-1 0
the matrix for clockwise rotation of 90 degrees about the origin is 0 1
-1 0
the matrix for anticlockwise rotation of 90 degrees about the origin is 0 -1
1 0
and u can use the formula method instead of the simultaneous method