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[widehat255/" Let "A=[[1,sin theta,1],[-...

[widehat255/" Let "A=[[1,sin theta,1],[-sin theta,1,sin theta],[-1,-sin theta,1]]],[," where "0<=theta<2 pi" .Then "],[,(:a:)" pet "(A)=0],[," (b) Det "(A)in(0,oo)],[" (c) Det "(A),=[2,4]],[," (d) Det "(A)in[2,oo)]

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