
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 $f(x)=2\sin (x+ \frac {π}{3})\cos x$.
(I) Find the range of $f(x)$;
(II) In $\triangle ABC$, let $a$, $b$, and $c$ be the sides opposite to angles $A$, $B$, and $C$, respectively. Given that $A$ is an acute angle, $f(A)= \frac { \sqrt {3}}{2}$, $b=2$, $c=3$, find the value of $\cos (A-B)$.

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