B Babita π Tutor III β 8.10K Points Q. If cos a + 2cos b + cos c = 2 then a, b, c are in (A) 2b = a + c (B) bΒ² = a Γ c (C) a = b = c (D) None of these ποΈ Show Answer π¬ Discuss π Share β Correct Answer: (A) 2b = a + c