A) 2b
B) b
C) 3b
D) 4b
E) 3b/2
Correct Answer: A
Solution :
Given that, \[\sin \frac{A}{2}\sin \frac{C}{2}=\sin \frac{B}{2}\] \[\sqrt{\frac{(s-b)(s-c)}{bc}}\sqrt{\frac{(s-a)(s-b)}{ab}}\] \[=\sqrt{\frac{(s-a)(s-c)}{ac}}\] \[\Rightarrow \] \[\frac{s-b}{b}=1\]\[\Rightarrow \] \[s=2b\]You need to login to perform this action.
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