Mathematics · Properties of Triangles
In a triangle ABC, if (a - b)2 cos2(C2) + (a + b)2 sin2(C2) = a2 + b2, then cos A =
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1cos C
- 2sin B✓
- 3sin C
- 4cos B
Correct answer
sin B
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