
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 eccentricity of the curve defined by the parametric equations $\begin{cases} x = 3 \cos \phi \\ y = \sqrt{5} \sin \phi \end{cases}$, where $\phi$ is a parameter.

A) $\dfrac{2}{3}$
B) $\dfrac{3}{5}$
C) $\dfrac{3}{2}$
D) $\dfrac{\sqrt{5}}{3}$

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