
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 $\overrightarrow{a} = (2, 1)$, $\overrightarrow{b} = (\sin x, \cos x)$, and $\overrightarrow{a} \parallel \overrightarrow{b}$.  
Find the values of: (1) $\tan x$  
(2) $\frac{3\sin x - \cos x}{\sin x + 3\cos x}$.

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