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If cosA/2=sqrt((b+c)/(2c)) , then prove ...

If `cosA/2=sqrt((b+c)/(2c))` , then prove that `a^2+b^2=c^2dot`

A

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

B

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

C

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

D

None of these

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A
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