JEE Math Practice Question
If $$A = {1 \over 2}\left[ {\begin{matrix} 1 & {\sqrt 3 } \\ { - \sqrt 3 } & 1 \\ \end{matrix} } \right]$$, then :
- A.$$\mathrm{A^{30}-A^{25}=2I}$$
- B.$$\mathrm{A^{30}+A^{25}-A=I}$$
- C.$$\mathrm{A^{30}=A^{25}}$$
- D.$$\mathrm{A^{30}+A^{25}+A=I}$$
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