12^2+13^2-2(12) (13) cos__=5^2

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asked Aug 13, 2024 229k views

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Matthias Zeis · Answer 1 · 2024-08-20T03:50:20+0000

Answer: * The third side of a triangle when we know two sides and angle between them.* The angles of a triangle when we know all three sides.It can be either of these forms;Given triangle ABC is right angle triangle.Law of cosines for this triangle is,since, , and .then,

Explanation:

12^2+13^2-2(12) (13) cos__=5^2

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