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In a A B C , prove that: (b^2-c^2)cotA+...

In a ` A B C ,` prove that: `(b^2-c^2)cotA+(c^2-a^2)cot B+(a^2-b^2)cotC=0`

A

`a^2`

B

`b^2`

C

`c^2`

D

0

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The correct Answer is:
D
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