9.
填空题
\((1)\triangle ABC\)中,\(A={{60}^{\circ }}\),\(b = 1\),\({S}_{∆ABC}= \sqrt{3} \),则\( \dfrac{a+b+c}{\sin A+\sin B+\sin C}= \)________ .
\((2)\)在公差不为\(0\)的等差数列\(\left\{{{a}_{n}}\right\} \)中,\({a}_{1}+{a}_{3}=8 \),且\(a_{4}\)为\(a_{2}\)和\(a_{9}\)的等比中项,则\(a_{5}=\)_____.
\((3)∆ABC \)三内角\(A\),\(B\),\(C\)的对边分别为\(a\),\(b\),\(c\),\( \sqrt{3}\sin A-a\cos B-2a=0 \),则\(∠B= \)_______.
\((4)\)已知数列\(\left\{{{a}_{n}}\right\} \)中,\({{a}_{1}}=-60,{a}_{n+1}={a}_{n}+3 \),则\(\left|{a}_{1}\right|+\left|{a}_{2}\right|+\left|{a}_{3}\right|+……+\left|{a}_{30}\right|= \)___________.