First Principles AI

Accedmychevron_right11thchevron_rightmathchevron_rightMatrices And Determinantschevron_rightExercise 4.3

Key fact

Reflection in the $y$ -axis:

\begin{bmatrix}x'\\y'\end{bmatrix}= \begin{bmatrix}-1&0\\0&1\end{bmatrix} \begin{bmatrix}x\\y\end{bmatrix}