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Cofactor of an Element
## Formula
The cofactor of $$a_{ij}$$ is:
$$C_{ij}=(-1)^{i+j}M_{ij}$$
## Sign Pattern
$$\begin{bmatrix}+&-&+\\-&+&-\\+&-&+\end{bmatrix}$$
## Usage
- Used in determinant expansion and calculation of the adjoint and inverse.
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Cofactor of an Element
## Formula
The cofactor of $$a_{ij}$$ is:
$$C_{ij}=(-1)^{i+j}M_{ij}$$
## Sign Pattern
$$\begin{bmatrix}+&-&+\\-&+&-\\+&-&+\end{bmatrix}$$
## Usage
- Used in determinant expansion and calculation of the adjoint and inverse.
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