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In any triangle ABC, the valur of a(cos...

In any triangle ABC, the valur of a`(cos ^(2) B+ cos ^(2)C)+ cos A (b cos B+ c cos C)` is-

A

`a+b+c`

B

c

C

a

D

b

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The correct Answer is:
C
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CHHAYA PUBLICATION-MCQ's-QUESTION PAPER 4
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