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In the adjoining figure angleBAC=60^(@) ...

In the adjoining figure `angleBAC=60^(@) and BC = a, AC = b and AB = c`, then :

A

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

B

`a^2=b^2+c^2-bc`

C

`a^2=b^2+c^2+bc`

D

`a^2=b^2+2bc`

Text Solution

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The correct Answer is:
B
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