
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 $\triangle ABC$, $\sin^2 A - \sin^2 C + \sin^2 B = \sin A \cdot \sin B$, then $\angle C$ is (　).

a. $60^\circ$    b. $45^\circ$    c. $120^\circ$    d. $30^\circ$

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