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

In a triangle ABC, `a=2 cm, b=3 cm and c=4 cm,` then the value of `cos A ` is-

A

`11/16`

B

`1/24`

C

`7/8`

D

`5/8`

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The correct Answer is:
C
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