Pregunta: Yes, A =_Without a cos aShow that AA° = A'A = 12, where A' indicates the transposition of the matrixA.

Given that matrix A as

$\begin{array}{c}\mathrm{A}=\left[\begin{array}{cc}\cos \alpha & -\sin \alpha \\ \sin \alpha & \cos \alpha \end{array}\right]\end{array}$

Now the transpose of A is given by interchanging rows to columns or vice-vers...