\(\Delta=\left|\begin{array}{ccc} 1 & \cos x & 1 \\ -\cos x & 1 & \cos x \\ -1 & -\cos x & 1 \end{array}\right|\)
(A) Δ = 2(1 – cos2 x)
(B) Δ = 2(2 – sin2 x)
(C) Minimum value of Δ is 2
(D) Maximum value of Δ is 4
Choose the correct answer from the options given below :
1
(A), (C) and (D) only
2
(A), (B) and (C) only
3
(A), (B), (C) and (D)
4
(B), (C) and (D) only