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In any triangle A B C , (b-c)cot A/2+(c...

In any triangle `A B C ,` `(b-c)cot A/2+(c-a)cot B/2+(a-b)cot C/2` =0

A

0

B

1

C

2

D

3

Text Solution

Verified by Experts

The correct Answer is:
A
By the sine rule,
we know that,
` a/(sin A)=b/(sin B)=c/(sin C) =k `
`=>a=ksinA,b=ksinB` and `C=sinC`
...
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