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In a DeltaABC, angleA=60^@ , AB = 3 cm ,...

In a `DeltaABC, angleA=60^@ , AB = 3 cm , AC = 4 cm ` .Find the length of AD, if it is angle bisector.

A

`(12sqrt3)/7`

B

`(6sqrt3)/7`

C

5

D

6

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