statics

Question: O is the circumcentre of $\Delta ABC$. If the forces P, Q and R acting along OA, OB, and OC are in equilibrium then $P : Q : R$ is

1) $\sin A:\sin B:\sin C$

2) $\cos A:\cos B:\cos C$

3) $a\cos A:b\cos B:c\cos C$

4) $a\sec A:b\sec B:c\sec C$

Solution:

Explanation: No Explanation

Composition and resolution of forces and condition of equilibrium of forces

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