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zo is one of the roots of the equation `z^n cos theta_0+ z^(n-1) cos theta_1 +. . . . . . + z cos theta_(n-1) + cos theta_(n) = 2`, where `theta in R` , then
(A) `|z_0| lt 1/2`
(B) `|z_0| gt 1/2`
(C) `|z_0| = 1/2`
(D)None of these

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