Feb 26, 2010 · I really need some clarification about cofactors and adj of a 2x2 matrix say the matrix is a b c d what would the cofactors be? what would the adj be? this is what i ...

Oct 31, 2010 · The inverse problem, which sounds like what you're trying to solve, goes like this: given two points, find the rotation matrix that takes one point to the other point.

Jun 26, 2012 · In case you didn't know . . . Find the inverse of: .A \\;=\\;\\begin{bmatrix}a&b\\\\c&d\\end{bmatrix} [1] Switch the two on the main diagonal (a\\text{ …

Dec 11, 2009 · A non-square matrix does NOT have an inverse, of course. Your matrix a, above, maps R 3 into R 2 so obviously, its null space is non-trivial. In this case, its null space is the …

Dec 12, 2008 · 4. Inverse - For every group element a, there is an element b, the inverse, such that a*b=b*a=e, where e is the identity. You just need to show that the set of all invertible 2x2 …

Apr 11, 2011 · Find nonzero 2x2 matrices A and B such that AB=0. I've been just trying to find two 2x2 matrices who result in a 2x2 matrix with 0 at each position. The answer I got is A = 1 1 1 1 …

Sep 29, 2010 · Hey, I was wondering if someone could help me find a basis for the space of all nxn matricies, over R, with trace 0.

Feb 7, 2011 · You can speak about the existence of right inverse R = (α, β) satisfying (a b) (α, β) = (1 0 0 1) I don't think that a right inverse is possible. Consider the equations involved: a α = 1 …

Oct 26, 2012 · I just did the matrix multiplication (they're 2x2 matricies with half zeros, so that's about than 10 second of work). I didn't know ahead of time it would work out this way. If was …

Nov 22, 2007 · Compare matrix elements on both sides of that equation, together with the equation ad-bc=1, and you will find that d = a and c = − b . (I'm using bars rather than stars to …