
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
Evaluate the sum 
\[ \text{cis } 80^\circ + \text{cis } 90^\circ + \text{cis } 100^\circ + \dots + \text{cis } 130^\circ \]
and express it in the form \( r \, \text{cis } \theta \), where \( r > 0 \) and \( 0^\circ \le \theta < 360^\circ \). Find \( \theta \) in degrees.

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