
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 that $\overrightarrow {a}$=(2sinx, cos2x), $\overrightarrow {b}$=(cosx, $\sqrt {3}$), and the function f(x) = $\overrightarrow {a}$•$\overrightarrow {b}$.
(I) Find the interval(s) where the function f(x) is monotonically increasing.
(II) In △ABC, the sides opposite to angles A, B, and C are a, b, and c respectively. If f($\frac {A}{2}$)=2, C=$\frac {2π}{3}$, and the area of the circumcircle of △ABC is 4π, find the perimeter of △ABC.

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