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In Delta ABC of a :b:c= 7 : 8: 9 .Then c...

In `Delta ABC` of a :b:c= 7 : 8: 9 .Then cos A : cos B is equal to :-

A

`11/63`

B

`22/63`

C

`2/9`

D

`14/11`

Text Solution

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The correct Answer is:
D
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