How to find reflection of $(a,b)$ along $y=x, y = -x$
I know for $y=x$ it is $(b,a)$ and for $y=-x$ it is $(-b,-a)$. But how to prove it?
[generic Qn so which tag to include do not know]
2026-02-22 17:47:39.1771782459
How to find reflection of $(a,b)$ along $y=x, y = -x$
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Well, you can just use Basic Linear Algebra for instance just write the matrix of the transformation(Reflection in this case) with a usual basis in both the cases, then it will be very clear to you that you are just supposed to operate that matrix and obtain the desired result.