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(i) यदि A=[{:(cosalpha,sinalpha),(-sinal...

(i) यदि `A=[{:(cosalpha,sinalpha),(-sinalpha,cosalpha):}]` हो, तो सत्यापित कीजिए कि A'A=I.
(ii) यदि `A=[{:(sinalpha,cosalpha),(-cosalpha,sinalpha):}]` हो, तो सत्यापित कीजिए कि A'A=I.

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