
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
Determine the number of functions among $y = \sin |x|$, $y = |\sin x|$, $y = \sin \left(2x + \frac{2\pi}{3}\right)$, $y = \cos \left(2x + \frac{2\pi}{3}\right)$ that have the smallest positive period of $\pi$.

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