
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 $f(x)=2\cos (x- \frac {π}{6})$, where $x\in R$.
(1) Find the value of $f(π)$;
(2) If $f(α+ \frac {2π}{3})= \frac {6}{5}$, where $α\in(- \frac {π}{2},0)$, find the value of $f(2α)$.

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