
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 the function $f(x)=\sin (2x+\varphi)$ where $(0 < \varphi < \pi)$, and the graph of the function passes through the point $\left( \dfrac {\pi}{12},1\right)$.  
$(1)$ Find the value of $\varphi$;  
$(2)$ In $\triangle ABC$, the sides opposite angles $A$, $B$, $C$ are $a$, $b$, $c$ respectively. If $a^{2}+b^{2}-c^{2}=ab$ and $f\left( \dfrac {A}{2}+ \dfrac {\pi}{12}\right)= \dfrac { \sqrt {2}}{2}$, find $\sin B$.

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