Solve this following

If $A=\left(\begin{array}{cc}\cos \theta & -\sin \theta \\ \sin \theta & \cos \theta\end{array}\right)$ then $A^{-1}=?$

A. A

B. $-\mathrm{A}$

C. Adj $A$

D. $-\operatorname{adj} \mathrm{A}$