Determinant Of A MatrixYou are currentlynot logged in Click here to log in 

The determinant of a matrix $M$ is written as either $M$ or $\det($M).$
The determinant of a 2x2 matrix $\left[\begin{matrix}a&b\\c&d\end{matrix}\right]$ is $\left\begin{matrix}a&b\\c&d\end{matrix}\right~=~adbc$
Determinants can be used to find the 2D vector cross product.
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Matrices  
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