
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 parametric equation of circle C (with θ as the parameter), P is the intersection point of circle C and the y-axis. If we establish a polar coordinate system with the center of circle C as the pole and the positive half of the x-axis as the polar axis, then the polar equation of the tangent line to circle C passing through point P is __________.

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