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In DeltaABC," if " A-B=120^(@) and R=8r,...

In `DeltaABC," if " A-B=120^(@) and R=8r`, then the value of `(1+cosC)/(1-cosC)` equals :
(All symbols used hav their usual meaning in a triangle)

A

12

B

15

C

21

D

31

Text Solution

Verified by Experts

The correct Answer is:
B
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