Geometry

Question Analysis

The question tests the ability to select between the Law of Sines and the Law of Cosines based on the given triangle information. Despite the mention of focusing on the Law of Cosines, we must assess both laws.

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 :

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