
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 $\triangle ABC$, the sides opposite to angles $A$, $B$, and $C$ are respectively $a$, $b$, and $c$, satisfying: 
1. The circumcenter of $\triangle ABC$ is inside the triangle (excluding the sides);
2. $(b^{2}-a^{2}-c^{2})\sin (B+C)= \sqrt {3}ac\cos (A+C)$.

(1) Find the magnitude of $A$;  
(2) Find the range of values for the algebraic expression $\dfrac {b+c}{a}$.

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