zo is one of the roots of the equation z...

zo is one of the roots of the equation `z^n cos theta0+ z^(n-1) cos theta2 +. . . . . . + z cos theta(n-1) + cos theta(n)` = 2, where `theta in R` , then (A) |z0| <`1/2` (B) |z0| > `1/2` (C) |z0| = `1/2`

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