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In a triangle ABC if 2a=sqrt(3)b+c, then...

In a triangle ABC if `2a=sqrt(3)b+c`, then possible relation is

A

`c^(2)=a^(2)+b^(2)-ab`

B

`a^(2)=b^(2)+c^(2)`

C

`b^(2)=a^(2)+c^(2)-sqrt3ac`

D

none of these

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The correct Answer is:
B
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  15. ln a triangle ABC, B=90^@ then the value of tan(A/2)=

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