已知\(f\left ( {α} \right )=\frac {\sin {\left ( {\pi -α} \right )\cdot \cos {\left ( {2\pi -α} \right )}}} {\cos {\left ( {\frac {\pi } {2}+α} \right )\cdot \sin {\left ( {π+α} \right )\cdot \cos {\left ( {-α} \right )}}}}\)，则\(f(\frac{\pi }{6}) = \) ___．
