Mathematics · Properties of Triangles
In a triangle ABC, if the sides a, b, and c are in arithmetic progression and angle A is twice angle C (A = 2C), then the ratio cos(A) : cos(B) : cos(C) is equal to:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11 : 9 : 6
- 22 : 9 : 12✓
- 33 : 4 : 8
- 42 : 3 : 4
Correct answer
2 : 9 : 12
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