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

`cos^(-1)((1)/(24))`

B

`cos^(-1)((11)/(16))`

C

`cos^(-1)((7)/(8))`

D

`cos^(-1)(-(1)/(4))`

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The correct Answer is:

C

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