~Maths and Logic Fundamentals (Cosine Rule)~
- Archie
- Apr 5, 2019
- 1 min read
The cosine rule is a great method to use when you have nothing but the sides of a triangle when combined with the 180 degree method. It can also be combined with both the sine rule and the 180 degree rule on a triangle with an angle between 2 sides.
Sides - a² = b² + c² - 2bc cos(A)
Angles - cos(A) = (b² + c² - a²) ÷ 2bc
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