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In triangle ABC r=(R)/(6) and r(1)=7r. T...

In triangle `ABC r=(R)/(6) and r_(1)=7r`. Then the mesaure of angle A=

A

`(pi)/(12)`

B

`(pi)/(6)`

C

`(pi)/(4)`

D

`(pi)/(3)`

Text Solution

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The correct Answer is:
D
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