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In a triangle ABC, a^3 cos(B-C) +b^3 cos...

In a triangle ABC, `a^3 cos(B-C) +b^3 cos(C-A) +c^3 cos(A-B)=`

A

abc

B

3abc

C

`a+b+c`

D

None of these

Text Solution

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The correct Answer is:
B
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