two forces F1 and f2 are acting on a body,the angle between them is theeta. Assuming that F1 is acting along x-axis.prove that the magnitude of resultantforce F is equal to F=uderrootF1^2+F2^2+2F1F2costheeta.
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Its the proof.....
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ayezadoll08:
But here +2F1F2costheeta and in your proof there is -2F1F2costheeta.. why?
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