9.
函数\(f(x)=\sin 2x- \sqrt {3}(\cos ^{2}x-\sin ^{2}x)\)的图象为\(C\),如下结论中正确的是______.
\(①\)图象\(C\)关于直线\(x= \dfrac {11}{12}π\)对称;
\(②\)图象\(C\)关于点\(( \dfrac {2π}{3},0)\)对称;
\(③\)函数\(f(x)\)在区间\((- \dfrac {π}{12}, \dfrac {5π}{12})\)内是增函数;\(④\)由\(y=2\sin 2x\)的图象向右平移\( \dfrac {π}{3}\)个单位长度可以得到图象\(C\).