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Let A=[(cos alpha,sinalpha),(-sinalpha,...

Let `A=[(cos alpha,sinalpha),(-sinalpha,cosalpha)]` and matrix B is defined such that `B = A + 4A^2+6A^3 +4A^4 + A^5`,If `det.(B)=1`, then the number of value of `alpha` in `[-2pi,2pi]`.

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