If A= [ cc 0 & - 2 2 & 0 ], Prove I + A =( I - A ) [ cc & - & ] - Vidyadip

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If $A=\left[\begin{array}{cc}0 & -\tan \frac{\alpha}{2} \\ \tan \frac{\alpha}{2} & 0\end{array}\right]$, Prove I $+ A =( I - A )\left[\begin{array}{cc}\cos \alpha & -\sin \alpha \\ \sin \alpha & \cos \alpha\end{array}\right]$

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