A) \[6\]
B) \[9\]
C) \[12\]
D) \[18\]
Correct Answer: C
Solution :
[c] \[\frac{IA.IB.IC}{ID.IE.IF}=\frac{\left( r\cos ec\frac{A}{2} \right)\left( r\cos ec\frac{B}{2} \right)\left( r\cos ec\frac{C}{2} \right)}{{{r}^{3}}}\] \[=\frac{1}{\sin \frac{A}{2}\sin \frac{B}{2}\sin \frac{C}{2}}=\frac{4R}{r}=12\]You need to login to perform this action.
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