Hi,

I need to use WolframAlpha to calculate the cofactor matrix of a specified matrix, but I can't see how to do it. Typing in the matrix only lists the inverse matrix and other properties, and W|A doesn't understand the term cofactor.

Is it possible on W|A?

## How To

### Calculating the cofactor matrix of a matrix

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**1**of**1**• [ 2 posts ]### Calculating the cofactor matrix of a matrix

by » Sat Oct 15, 2011 4:34 am- adammw
**Posts:**2**Joined:**Sat Oct 15, 2011 4:31 am

### Re: Calculating the cofactor matrix of a matrix

by » Sat Oct 22, 2011 1:39 amUsing a little math, I've worked out that you can get back the cofactor matrix from an inverse matrix if you know the determinant.

The proper syntax would be:

Unfortunately I can't get it to work when using a variable for the matrix so you need to specify the same matrix twice.

The proper syntax would be:

- Code: Select all
`transpose(inverse {matrix} * det {matrix})`

Unfortunately I can't get it to work when using a variable for the matrix so you need to specify the same matrix twice.

- adammw
**Posts:**2**Joined:**Sat Oct 15, 2011 4:31 am

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