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Questions  >>  CBSE XII  >>  Math  >>  Matrices
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If $ A = \begin{bmatrix} \cos\theta & -\sin\theta \\ \sin\theta & \cos\theta \end{bmatrix}$, then find the value of $\theta$ satisfying the equation $A^T + A = I_2$


$(A)\; \theta = 2 n \pi +\frac{\pi}{3}$
$(B)\; \theta = 2 n \pi -\frac{\pi}{3}$
$(C)\; \theta = 2 n \pi \pm \frac{\pi}{3}$
$(D)\; \theta = 2n\pi$

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