A body is in equilibrium under the action of three coplanar forces `P,Q and R` as shown in figure. Select the correct statement.

Options

A. `P/(sin alpha)=Q/(sin beta)=R/(sin gamma)`
B. `P/(cos alpha)=Q/(cos beta)=R/(cos gamma)`
C. `P/(tan alpha)=Q/(tan beta)=R/(tan gamma)`
D. `P/(sin beta)=Q/(sin gamma)=R/(sin alpha)`

Answer

A

Explanation

According to Lami's theorem
`P/(sin alpha)=Q/(sin beta)=R/(sin gamma)`