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If in a triangleA B C , (2cosA)/a+(cos B...

If in a triangle`A B C ,` `(2cosA)/a+(cos B)/b+(2cosC)/c=a/(b c)+b/(c a)` , then prove that the triangle is right angled.

A

`90^(@)`

B

`135^(@)`

C

`45^(@)`

D

None of these

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A
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