Notizen
Cosine Rule
Inhalt der Notizen (1)
Seite 1
The Cosine rule, similar to the sine rule, is true for all triangles.
The Cosine rule states that, in any triangle abc,
This is rule is useful when:
You know all 3 sides.
You know 2 sides and the angle at which they meet.
Example:
We can find A using the cosine rule:
cosA = 10^2 + 6^2 - 7^2
2(10)(6)
cosA = 87
120
A = 43.53*
New Page
Informationen
- Beschreibung
- This note explains the cosine rule, how to use it and when it is useful.
- Erstellt von
- rory.examtime
- Aufrufe
- 515
- Tags
- Bewertung