A) \[\cos \frac{A}{2}:\cos \frac{B}{2}:\cos \frac{C}{2}\]
B) \[\sin \frac{A}{2}:\sin \frac{B}{2}:\sin \frac{C}{2}\]
C) \[\sec \frac{A}{2}:\sec \frac{B}{2}:\sec \frac{C}{2}\]
D) \[\cos ec\,\frac{A}{2}:\,\,\cos ec\,\frac{B}{2}\,:\,\cos ec\,\frac{C}{2}\]
Correct Answer: A
Solution :
Three forces P, Q and R acting along\[lA,lB\]and \[lC\]are in equilibrium.You need to login to perform this action.
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