Define Lami's theorem.

Explanation

Lami.s Theorem: If a system of three concurrent and coplanar forces is in equilibrium, then Lami.s theorem states that the magnitude of each force of the system is proportional to sine of the angle between the other two forces.
i.e. `|vecF| prop sin alpha, |vecF_2| prop sin beta , |vecF_3| prop sin gamma`