Question
यदि $F(\alpha ) = \left[ {\begin{array}{*{20}{c}}{\cos \alpha }&{ - \sin \alpha }&0\\{\sin \alpha }&{\cos \alpha }&0\\0&0&1\end{array}} \right]$ और $G\,(\beta ) = \left[ {\begin{array}{*{20}{c}}{\cos \beta }&0&{\sin \beta }\\0&1&0\\{ - \sin \beta }&0&{\cos \beta }\end{array}} \right]$, तब ${[F(\alpha )\,G(\beta )]^{ - 1}}$=