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In triangle ABC , a (b^2 +c^2 ) cos ...

In triangle `ABC , a (b^2 +c^2 ) cos A + b (c^2 +a^2 ) cos B + c(a^2 +b^2 ) cos C ` is equal to

A

`abc`

B

2 abc

C

3 abc

D

4abc

Text Solution

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The correct Answer is:
C
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