
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 $\sin \theta= \frac {m-3}{m+5}$ and $\cos \theta= \frac {4-2m}{m+5}$, where $\frac{\pi}{2} < \theta < \pi$, find the value of $\tan \theta$.

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