
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 acute triangle $ABC$, $\dfrac {a^{2}+b^{2}-c^{2}}{-ac}= \dfrac {\cos (A+C)}{\sin A\cos A}$.
(1) Find angle $A$;
(2) If $a= \sqrt {3}$, when $\sin B+\cos (C- \dfrac {7π}{12})$ reaches its maximum value, find $B$ and $b$.

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