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The perimeter of a Delta ABC is 6 times ...

The perimeter of a `Delta ABC` is 6 times the A.M. of the sines of its angles. If the side 'a' is 1, then the angle A is

A

`(pi)/(6)`

B

`(pi)/(4)`

C

`(pi)/(3)`

D

`(pi)/(2)`

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A
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