
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 function $f(α) = \frac{\sin(\pi - α)\cos(2\pi - α)\cos(\frac{3\pi}{2} + α)}{\cos(\frac{\pi}{2} + α)\sin(\pi + α)}$,  
(1) If $α = -\frac{π}{3}$, find the value of $f(α)$;  
(2) If $α$ is an angle in the second quadrant, and $\cos(α - \frac{π}{2}) = \frac{3}{5}$, find the value of $f(α)$.

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