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In DeltaABC,r1cot""A/2+r2cot""B/2+r3cot"...

In `DeltaABC,r_1cot""A/2+r_2cot""B/2+r_3cot""C/2=`

A

s

B

2S

C

3S

D

4s

Text Solution

Verified by Experts

The correct Answer is:
C
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