The number of real solutions of the equation √(1 + cos2x) = √2 cos^–1 (cos x)in [π/2, π] is
The number of real solutions of the equation √(1 + cos2x) = √2 cos–1 (cos x)in [π/2, π] is
(A) 0
(B) 1
(C) 2
(D) Infinite
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