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If AD,BE,CF are internal bisectors of th...

If `AD,BE,CF` are internal bisectors of the angles of `DeltaABC` then `cos(A/2)/(AD)+cos(B/2)/(BE)+cos(C/2)/(CF)=`

A

`(1)/(a)+(1)/(b)+(1)/(c)`

B

`2((1)/(a)+(1)/(b)+(1)/(c))`

C

`(1)/(2)((1)/(a)+(1)/(b)+(1)/(c))`

D

`3((1)/(a)+(1)/(b)+(1)/(c))`

Text Solution

Verified by Experts

The correct Answer is:
a
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