
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 $f(x)=\tan \left(x+ \frac {\pi}{4}\right)$.  
(I) Find the domain of $f(x)$.  
(II) Let $\beta$ be an acute angle, and $f(\beta)=2\sin \left(\beta+ \frac {\pi}{4}\right)$, find the value of $\beta$.

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