(1) To obtain the graph of the function $y=\sin \left(2 x-\frac{\pi}{6}\right)$, the graph of the function $y=\cos 2 x$ can be ( ).
(A) shifted to the right by $\frac{\pi}{6}$ units
(B) shifted to the right by $\frac{\pi}{3}$ units
(C) shifted to the left by $\frac{\pi}{6}$ units
(D) shifted to the left by $\frac{\pi}{3}$ units
(1) Since
$$
\begin{aligned}
y & =\sin \left(2 x-\frac{\pi}{6}\right) \\
& =\cos \left(\frac{\pi}{2}-\left(2 x-\frac{\pi}{6}\right)\right) \\
& =\cos \left(\frac{2}{3} \pi-2 x\right) \\
& =\cos 2\left(x-\frac{\pi}{3}\right),
\end{aligned}
$$

Therefore, the graph of $y=\cos 2 x$ is shifted to the right by $\frac{\pi}{3}$ units to obtain the graph of $y=\cos 2\left(x-\frac{\pi}{3}\right)$. Hence, the correct choice is B.