
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 that the terminal side of angle $\alpha$ passes through point P(4, -3).

(Ⅰ) Write the values of $\sin\alpha$, $\cos\alpha$, and $\tan\alpha$;  
(Ⅱ) Calculate the value of $$\frac {\sin(\pi+\alpha)+2\sin( \frac {\pi}{2}-\alpha)}{2\cos(\pi-\alpha)}$$.

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