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In a delta ABC, a,c, A are given and b(1...

In a `delta ABC,` a,c, A are given and `b_(1) , b_(2)` are two values of third side b such that `b_(2)=2b_(1).` Then, the value of sin A.

A

`sqrt((9a^(2)-c^(2))/(8a^(2)))`

B

`sqrt((9a^(2)-c ^(2))/(8c^(2)))`

C

`sqrt((9a^(2)-c ^(2))/(8b^(2)))`

D

None of these

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The correct Answer is:
B
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