Maths — Matrices & Determinants
2x2 determinant, inverse and transpose rules.
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A = \begin{pmatrix} a & b \\ c & d \end{pmatrix}
\det(A) = ad - bc
A^{-1} = \frac{1}{ad-bc}\begin{pmatrix} d & -b \\ -c & a \end{pmatrix}
(AB)^T = B^T A^T