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If in triangle ABC, sum "sin"(A)/(2)=(6)...

If in triangle `ABC, sum "sin"(A)/(2)=(6)/(5) and sum II_(1)=9` (where `l_(1),l_(2),l_(3))` sin circumradius R is equal

A

`(15)/(8)`

B

`(15)/(4)`

C

`(15)/(2)`

D

`(4)/(12)`

Text Solution

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The correct Answer is:
A
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