91- 6303239042
Inverse of a $$2\times2$$ Matrix
## Formula
For:
$$A=\begin{bmatrix}a&b\\c&d\end{bmatrix}$$
if:
$$ad-bc\ne0$$
then:
$$A^{-1}=\frac1{ad-bc}\begin{bmatrix}d&-b\\-c&a\end{bmatrix}$$
## Usage
- Used for direct calculation of the inverse of a $2\times2$ matrix.
