Geometry

Question Analysis

The question checks the ability to select between the Law of Sines and the Law of Cosines given two angles and one side of a triangle. Despite the mention of the Law of Cosines,  the actual conditions suggest a different approach.

Key Concept Explanation

Law of Sines: , used when we know angles and their opposite sides.

Law of Cosines: , for cases with two sides and the included angle or three sides known.

Step-by-Step Solution

1. First, find : Since the sum of angles in a triangle is ,

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