Lami's Theorem
Category : JEE Main & Advanced
If three forces acting at a point be in equilibrium, each force is proportional to the sine of the angle between the other two. Thus if the forces are \[P,\,\,Q\] and \[R;\] \[\alpha ,\,\,\beta ,\,\,\gamma \] be the angles between \[Q\] and \[R,\,\,R\] and \[P,\,\,P\] and \[Q\] respectively, also the forces are in equilibrium, we have, \[\frac{P}{\sin \alpha }=\frac{Q}{\sin \beta }=\frac{R}{\sin \gamma }\].
The converse of this theorem is also true.
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