Mathematics · Trigonometry
In a plane triangle ABC, if side lengths a, b, and c are in Arithmetic Progression, then a cos2(C2) + c cos2(A2) is equal to:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 13b2✓
- 2b2
- 33a2
- 43b4
Correct answer
3b2
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