Adjoint of a square (non singular matrix) = product of the determinant of matrix by the inverse of matrix. Adjoint([A])= det( [A]) * [A]^-1.
To get the inverse of a matrix, have its name displayed on command line then press the reciprocal key [x]^-1
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press the "MODE" button 3 times and then press 3 ..., now this is normal mode
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The for now enter 1 0 as the matrix (press the = key after you have finished entering a number). 0 1
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Here is an account of what you can do with matrices on this scientific calculator. Certain precautions must be taken as concerns the dimensions of the matrices. Refer to your text book on matrix algebra.
On this calculator the largest matrices you can define have dimensions 3X3.
Once you have created a square matrix, for example matA.
You press [Shift][Matrix] [7:det] [SHIFT][MATRIX][3:MatA], close the parenthesis and press [ENTER].
If
you have defined two similar matrices (same number of row and same
number of columns) you can ADD them or subtract them. The operation keys
are Plus and Minus as for any number.
To multiply you use the multiplication sign. The matrices must be compatible (mxn) multiplied by (nxk).
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