Difference between revisions of "Law of Cosines"
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The '''Law of Cosines''' is a formula used in finding lengths and angles of a triangle. For sides a, b, and c with opposite angles A, B, and C respectively: | The '''Law of Cosines''' is a formula used in finding lengths and angles of a triangle. For sides a, b, and c with opposite angles A, B, and C respectively: | ||
| − | <math>c^2 = a^2 + b^2 - | + | <math>c^2 = a^2 + b^2 - 2ab\cos C</math> |
Revision as of 21:21, 21 June 2006
The Law of Cosines is a formula used in finding lengths and angles of a triangle. For sides a, b, and c with opposite angles A, B, and C respectively:
