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In triangle ABC, 2(bc cosA-ac cosB-ab co...

In `triangle ABC, 2(bc cosA-ac cosB-ab cosC)=`

A

`0`

B

`(a+b+c)`

C

`-3a^(2)+b^(2)+c^(2)`

D

`2(a^(2)+b^(2)+c^(2))`

Text Solution

Verified by Experts

The correct Answer is:
C
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