
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
Convert the following parametric equations into ordinary equations, and explain what curves they represent:

1. $\begin{cases} x=5\cos \phi \\ y=4\sin \phi \end{cases}$ ($\phi$ is the parameter);
2. $\begin{cases} x=1-3t \\ y=4t \end{cases}$ ($t$ is the parameter).

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