Mathematics · Matrices

यदि A = cos(α) -sin(α) sin(α) cos(α) और A + A' = I है, तो α का मान क्या है?

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π 3

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यदि A = cos(&alpha;) -sin(&alpha;) sin(&alpha;) cos(&alpha;) और A + A' = I है, तो &alpha; का मान क्या है?