
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
Translate the function \(f(x)=2\sin (x+2\varphi)\) (\(|\varphi| < \frac {\pi}{2}\)) to the left by \(\frac {\pi}{2}\) units. After this translation, the resulting graph is symmetric about the line \(x= \frac {\pi}{4}\), and \(f(0) > 0\). Determine the value of \(\varphi\).

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