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[" Let "A=([cos a,-sin alpha],[sin alpha...

[" Let "A=([cos a,-sin alpha],[sin alpha,cos alpha]),(alpha in R)" such that "A^(32)=([0,-1],[1,0])." Then a value of "alpha" is "],[[(pi)/(16)," 2) "0," 3) "(pi)/(32)," 4) "(pi)/(64)]]

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