Difference between revisions of "Law of Cosines"
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| − | The '''Law of Cosines''' is a formula used in finding | + | The '''Law of Cosines''' is a formula used in finding [[length]]s and [[angle]]s of a [[triangle]]. For a triangle with [[side]]s <math>a</math>, <math>b</math>, and <math>c</math> opposite [[angle]]s <math>A</math>, <math>B</math>, and <math>C</math> respectively, the Law of Cosines states: |
<math>c^2 = a^2 + b^2 - 2ab\cos C</math> | <math>c^2 = a^2 + b^2 - 2ab\cos C</math> | ||
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==See also== | ==See also== | ||
* [[Pythagorean Theorem]] | * [[Pythagorean Theorem]] | ||
| − | * [[Law of | + | * [[Law of Sines]] |
* [[Trigonometry]] | * [[Trigonometry]] | ||
, 
, and 
opposite 
, 
, and 
respectively, the Law of Cosines states:
