Included angle and opposite side
Included angle and opposite side
The Cosine Rule works in any triangle, not only right-angled triangles. It is most useful when you know two sides and the included angle, or all three sides and want an angle.
Included angle and opposite side
Included angle and opposite side
The Cosine Rule works in any triangle, not only right-angled triangles. It is most useful when you know two sides and the included angle, or all three sides and want an angle.