Question

If cos² (π/8) is a root of the equation x² + bx + c = 0, where b, c ∈ Q, then the ordered pair (b, c) is:

(A) (1, 1/8)

(B) ( - 1, 1/8)

(C) (1, - 1/8)

(D) (- 1, - 1/8)

Answer 1

Correct option (B)

Explanation:

x² + bx + c = 0