True or False 1. If A is an orthogonal matrix then gt_(A) = 1. 2. If there is an orthogonal projection on a subspace then it is an orthogonal transformation. 3. Let's say that A is a n*n matrix such that it is AA2 = 2A-l, then the only possible eigenvalue will be lambda = 1. 4. The matrix of [cos x, 1, -sin x] is invertible for all x. [O , 2, 0] [sin x ,3, cos x] 5. The linear system that is inconsistent {3x4y=5} has the unique least squares approximate value. {6x+8y=2}