2.
已知在\(\triangle ABC\)中,角\(A\),\(B\),\(C\)所对的边分别为\(a\),\(b\),\(c\),且满足\(\dfrac{\cos B}{b}+\dfrac{\cos C}{c}=\dfrac{\sin A}{2\sin C}\).
\((1)\)试求\(b\)的值;
\((2)\)若\(\sqrt{3}b\cos C=(2a-\sqrt{3}c)\cos B\),且\(\sin A\),\(\sin B\),\(\sin C\)成等比数列,试求\(\triangle ABC\)的面积.