
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given the function $f(x)= \sqrt {2}\cos (x- \frac {\pi}{12})$, $x\in\mathbb{R}$.  
(Ⅰ) Find the value of $f(- \frac {\pi}{6})$;  
(Ⅱ) If $\cos \theta= \frac {3}{5}$, $\theta\in( \frac {3\pi}{2},2\pi)$, find $f(2\theta+ \frac {\pi}{3})$.

Present the answer in LaTex format: \boxed{Your answer}
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