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USA - Geometry Right triangles and trigonometry

Law of Cosines

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Questions
Question 1
181881
The Law of Cosines states that, in any triangle \(ABC\):
A.
\(a^2 = b^2 + c^2 - 2bc\cos A\)
B.
\(a^2 = b^2 + c^2 + 2bc\cos A\)
C.
\(a^2 = b^2 + c^2\)
D.
\(a^2 = b^2 - c^2\)
\(a^2 = b^2 + c^2 - 2bc\cos A\)

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