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The perimeter of a ΔABC is six times the arithmetic mean of the sine of its angles. If the side a is 1, then the angle ∠A is

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The perimeter of a ΔABC is six times the arithmetic mean of the sine of its angles. If the side a is 1, then the angle ∠A is

(A)  π/6

(B)  π/3

(C)  π/2

(D)  π

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Correct option (A)  π/6

 Convert sin B and sin C to sin A

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