Lami's Theorem

                                   Lami's Theorem

Lami's Theorem expresses that on the off chance that three coplanar powers acting at a point be in harmony, at that point each power is relative to the sine of the edge between the other two powers. Numerically 

Lami's Theorem 

where P, Q, and R are the three powers and α, β and γ are the edges as appeared in Fig 1.2.