
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
If there exist two points on the graph of the function $y=f(x)$ such that the tangent lines at these two points are perpendicular to each other, then the function $y=f(x)$ is said to have Property $T$. Among the following functions:

$①y=\sin x$;

$②y=\ln x$;

$③y=e^{x}$;

$④y=x^{3}$.

Determine which one(s) possess Property $T$.

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