Law of cosines

English

Noun

1. Template:Lb A generalization of the Pythagorean theorem that relates the lengths of the sides of a triangle to the cosine of one of its angles.

Usage notes

Let Template:Math, and Template:Math be the lengths of the sides of a triangle opposite angles Template:Math, and Template:Math. The law of cosines states

$a^2=b^2+c^2-2bc\cos A$

$b^2=a^2+c^2-2ac\cos B$

$c^2=a^2+b^2-2ab\cos C$.

Synonyms

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Translations

• Azerbaijani: Template:T
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• Tagalog: Template:T

See also

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