statics

Question: If the resultant of forces P,Q,R acting along the sides BC, CA, AB of a $\Delta ABC$passes through its circumcentre, then

1) $P\sin A+Q\sin B+R\sin C=0$

2) $P\cos A+Q\cos B+R\cos C=0$

3) $P\sec A+Q\sec B+R\sec C=0$

4) $P \tan A+Q\tan B+R\tan C=0$

Solution:

Explanation: No Explanation

Parallel forces Moment and Couples

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