1.Let n≥2n\ge2n≥2 be integer. A=[cos(2π/n)sin(2π/n)0−sin(2π/n)cos(2π/n)0001]A = \begin{bmatrix}\cos(2\pi/n)&\sin(2\pi/n)&0\\-\sin(2\pi/n)&\cos(2\pi/n)&0\\0&0&1\end{bmatrix}A=cos(2π/n)−sin(2π/n)0sin(2π/n)cos(2π/n)0001 and III identity. Thena.An=IA^n = IAn=I and An−1≠IA^{n-1} \neq IAn−1=Ib.Am≠IA^m \neq IAm=I for any mmmc.AAA is not invertibled.Am=0A^m=0Am=0 for some mmmLogin to continueOnly logged in users canattempt or see the solution.
