Find the value of
\[8\cos^210^\circ - \dfrac{1}{\sin 10^\circ}.\]
Question:
Find the value of
\[8\cos^210^\circ - \dfrac{1}{\sin 10^\circ}.\]
Answer:
Let's think step by step.

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Find the value of
\[8\cos^210^\circ - \dfrac{1}{\sin 10^\circ}.\]
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