Which of the following states that, "If a body is in equilibrium, under the action of three concurrent forces, each force is proportional to the sine of the angle between the other two forces"?

Explanation

Explanation: Lami's theorem is an equation relating the magnitudes of three coplanar, concurrent and non-collinear forces , which keeps an object in static equilibrium, with the angles directly opposite to the corresponding forces. According to the theorem: Important Points Varignon’s Principle of moments (or the law of moments): It states, “If a number of coplanar forces are acting simultaneously on a particle, the algebraic sum of the moments of all the forces about any point is equal to the moment of their resultant force about the same point .” ​ = sin α A ​ = sin β B ​ sin γ C i.e. R × r = F 1 × r 1 + F 2 × r 2