In a \( \triangle A B C, A=\frac{\pi}{3} \) and \( b: c=2: 3 \). If \( \tan \alpha=\frac{\sqrt{3...

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In a \( \triangle A B C, A=\frac{\pi}{3} \) and \( b: c=2: 3 \).
If \( \tan \alpha=\frac{\sqrt{3}}{5}, 0\alpha\frac{\pi}{2} \) then-
(a) \( B=60^{\circ}+\alpha \)
(b) \( C=60^{\circ}+\alpha \)
(c) \( B=60^{\circ}-\alpha \)
(d) \( \mathrm{C}=60^{\circ}-\alpha \)
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