
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
In △ABC, the sides opposite to angles A, B, C are a, b, c respectively. cos(π-B) = $\frac {2}{3}$, c=1, and asinB = $\sqrt {6}$csinA.
(I) Find the value of edge a;
(II) Find the value of cos(2B+$\frac {π}{3}$).

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