In a triangle ABC, if a = 2, b = 3 and c...

In a triangle ABC, if a = 2, b = 3 and `c=4`, then cos A is equal to

A

`(7)/(8)`

B

`(1)/(3)`

C

`(1)/(2)`

D

`(1)/(sqrt(3))`

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The correct Answer is:

A

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