
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
Formulate the equations of the tangent line and the normal line to the curve at the point corresponding to the parameter value $t = t_{0}$.

\[
\left\{
\begin{array}{l}
x = a(t \cdot \sin t + \cos t) \\
y = a(\sin t - t \cdot \cos t)
\end{array}
\right.
\]

\( t_{0} = \frac{\pi}{4} \)

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