A Triangle from an Angle Relation

★ 6/10Law of Sines trigonometry Trigonometric Identities

Problem

In $\triangle ABC$ , $A+B=3C$ and $2\sin(A-C)=\sin B$ .

1. Find $\sin A$ . 2. If $AB=5$ , find the altitude to the side $AB$ .

Answer

Solution

Difficulty	6/10
Topics	Law of Sines, trigonometry, Trigonometric Identities

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