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In /\ABC prove that (r1)/(bc) + (r2)/(ca...

In `/_\ABC` prove that `(r_1)/(bc) + (r_2)/(ca) + (r_3)/(ab) = 1/r - 1/(2R)`.

A

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

B

`1+r/R`

C

`2+r/(2R)`

D

`1-r/(2R)`

Text Solution

Verified by Experts

The correct Answer is:
A
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