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In a Delta ABC, the value of (a cosA+b c...

In a `Delta ABC,` the value of `(a cosA+b cosB+c cosC)/(a+b+c)` is equal to

A

`(r )/(R )`

B

`(R )/(2r)`

C

`(R )/(r )`

D

`(2r)/(R )`

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The correct Answer is:
A
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