
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
(1) Simplify: $\dfrac {\tan (3\pi-\alpha)\cos (2\pi-\alpha)\sin (-\alpha+ \dfrac {3\pi}{2})}{\cos (-\alpha-\pi)\sin (-\pi+\alpha)\cos (\alpha+ \dfrac {5\pi}{2})}$;  
(2) Given $\tan \alpha= \dfrac {1}{4}$, find the value of $\dfrac {1}{2\cos ^{2}\alpha -3\sin \alpha \cos \alpha }$.

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