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Two forces of magnitudes P and Q acting at a point have a resultant R and the resolved part of R along P is Q. Prove that the angle between the forces is: x = cos inverse ((Q-P)/Q) = 2 sin inverse √(P/2Q) and R = √(Q²-P²+2PQ)

Two forces of magnitudes P and Q acting at  a point have a resultant R and the resolved part of R along P is Q. Prove that the angle between the forces is:

x = cos inverse ((Q-P)/Q) = 2 sin inverse √(P/2Q) and R = √(Q²-P²+2PQ)

Grade:12th pass

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