Question:medium

In a triangle \(\triangle ABC\), if \(a, b,\) and \(c\) are in arithmetic progression, then \(\cos A + 2 \cos B + \cos C =\)

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In any triangle where sides are in A.P., specific trigonometric relations like \(\tan(A/2) \tan(C/2) = 1/3\) hold true.

Updated On: May 16, 2026

\(1\)
\(2\)
\(3/2\)
\(\sqrt{3} + 1\)

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The Correct Option is B

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