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In DeltaABC, bisector of angleA intersec...

In `DeltaABC`, bisector of `angleA` intersects BC at D. If AB = 4 cm, AC = 3 cm and `angleA = 60^(@)`, then find the length of AD-

A

`(12sqrt(3))/(5)`

B

`(12sqrt(5))/(7)`

C

`(15sqrt(3))/(7)`

D

`(12sqrt(3))/(7)`

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