alleryBy the law of sines in a triangle, a / sin A is equal to:
Ab / cos B
Ba · b · c
Cc · sin C
Db / sin B
Answer & Solution
Correct answer: D. b / sin B
1. Law of sines: a / sin A = b / sin B = c / sin C = 2R (R = circumradius).
2. Holds for any triangle (acute, obtuse, right).
3. Used to solve triangles when an angle and the opposite side are known.
_Source: syllabus Maths Ch 3 §3.6 (extension to triangles)_
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