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In triangleABC, if a=13, b=14, c=15, the...

In `triangleABC`, if `a=13, b=14, c=15`, then `cos((A)/(2))=`

A

`(1)/(sqrt(5))`

B

`(2)/(sqrt(5))`

C

`(sqrt(5))/(2)`

D

`(sqrt(5))/(4)`

Text Solution

Verified by Experts

The correct Answer is:
B
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