9.
给出下列说法:
\(①\)终边在\(y\)轴上的角的集合是\(\{\alpha |\alpha =\dfrac{k\pi }{2},k\in Z\}\);
\(②\)若\(\sin x+\cos x=\dfrac{1}{5}\),则\(\tan x+\dfrac{1}{\tan x}\)的值为\(-\dfrac{12}{25}\);
\(③\)函数\(f(x)=3\sin (-2x+\dfrac{\pi }{3})\)在区间\([-\dfrac{\pi }{12},\dfrac{5\pi }{12}]\)内是减函数;
\(④\)若函数\(f(x)=a\sin 2x+b\tan x+2\),且\(f(-3)=5\),则\(f(3)\)的值为\(-1\);
\(⑤\)函数\(y=\ln |x-1|\)的图像与函数\(y=-2\cos πx(-2\leqslant x\leqslant 4)\)的图像所有交点的横坐标之和等于\(6\).
其中正确的说法是 \(.(\)写出所有正确说法的序号\()\)