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Questions  >>  JEEMAIN and NEET  >>  Mathematics  >>  Class12  >>  Determinants
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Q)

If $F(\alpha)=\begin{bmatrix}\cos \alpha&-\sin \alpha&0\\\sin \alpha&\cos \alpha&0\\0&0&1\end{bmatrix}$ $\alpha \in R$ then $[F(\alpha)]^{-1}$ is equal to

$\begin{array}{1 1}(A)\;F(-\alpha)&(B)\;F(\alpha^{-1})\\(C)\;F(2\alpha)&(D)\;\text{None of these}\end{array}$

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