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Qn #746
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The perimeter of a $\Delta ABC$ is 6 times the arithmetic mean of the sines of its angles. If the side a is 1, then the angle A is
A.
$\frac{\pi}{6}$
B.
$\frac{\pi}{3}$
C.
$\frac{\pi}{2}$
D.
$\pi$
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