AP EAMCET · Maths · Properties of Triangles
In a triangle \(A B C\), if \(a, b, c\) are in arithmetic progression and the angle \(A\) is twice the angle C, then \(\cos \mathrm{A}: \cos \mathrm{B}: \cos \mathrm{C}=\)
- A \(2: 3: 4\)
- B \(3: 4: 8\)
- C \(2: 9: 12\)
- D \(1: 9: 6\)
Answer & Solution
Correct Answer
(C) \(2: 9: 12\)
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