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GATE2019-2-18

  1. GATE2019-2-90
  2. GATE2019-2-90
  3. GATE2019-2-90
  4. GATE2019-2-90

The transformation matrix for mirroring a point in $x – y$ plane about the line $y=x$ is given by

  1. $\begin{bmatrix} 1 & 0 \\ 0 & -1 \end{bmatrix}$
  2. $\begin{bmatrix} -1 & 0 \\ 0 & 1 \end{bmatrix}$
  3. $\begin{bmatrix} 0 & 1 \\ 1 & 0 \end{bmatrix}$
  4. $\begin{bmatrix} 0 & -1 \\ -1  & 0 \end{bmatrix}$
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