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In Delta ABC ,if 5 cos C + 6 cos B = 4 ...

In ` Delta ABC ,if 5 cos C + 6 cos B = 4 and 6 cos A + 4 cos C = 5 " then " tan A//2 tan B//2`=

A

` 1//5`

B

` 2//5`

C

` 3//5`

D

` 4//5`

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A
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