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In Delta ABC with usual notation r1/(bc...

In `Delta ABC` with usual notation `r_1/(bc)+r_2/(ca)+r_3/(ab)` is

A

`(1)/(2R)-(1)/(r)`

B

2R-r

C

r-2R

D

`1/r-(1)/(2R)`

Text Solution

Verified by Experts

The correct Answer is:
D
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