Let A = [[a, b],[c, d]] be a 2x2 matrix. Let vector v = and vector w = be the column vectors of A. Compute the cross product of vector v and w over R^3.
Any vector `x` in `R^3` can be written as `x=x_1i+x_2j+x_3k`
where `i,j,k` are unit vectors along the three directions.
Now given matrix is `A=[[a,b],[c,d]]` . According to the problem the vector `v` is the column vector of the matrix `A` .
So we can take `v=[[a],[c]]` which can be wriiten as `v=ai+cj+0k` , a vector in `R^3.`
`=cx_3i-ax_3j+(ax_2-cx_1)k` . Answer.