Mathematics Matrices Adjoint and Inverse of a Square Matrix

If \(A=\begin{bmatrix}\cos x&\sin x&0\\\ -\sin x&\cos x&0\\\ 0&0&1\end{bmatrix}=f(x)\), then A-1 equals 

1
f(-x)
2
-f(x)
3
-f(-x)
4
More than one of the above
5
None of the above

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