
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
In the Cartesian coordinate system, the terminal side of an acute angle $ \alpha $ intersects with the unit circle centered at the origin at point $ A $, given that the ordinate of point $ A $ is $ \frac{4}{5} $.

     (Ⅰ) Find $ \sin \alpha $ and $ \cos \alpha $;

     (Ⅱ) Calculate the value of $ \frac{\sin (2\pi +\alpha ) \cdot \cos (\pi +\alpha ) \cdot \tan (3\pi -\alpha )}{\cos (\frac{\pi }{2}-\alpha ) \cdot \tan (-\pi -\alpha )} $.

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