Product of cosines of doubling angles (multiply and divide by sin)

1. A.
   $\dfrac{1}{16}$
2. B.
   $\dfrac{1}{32}$
3. C.
   $\dfrac{1}{64}$
4. D.
   $\dfrac{-1}{32}$

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1. A.
   $\dfrac{1}{16}\sin\left(\dfrac{\pi}{24}\right)$
2. B.
   $\dfrac{\sqrt{3}}{32}\csc\left(\dfrac{\pi}{24}\right)$
3. C.
   $\dfrac{\sqrt{3}}{16}$
4. D.
   $\dfrac{1}{32}\sec\left(\dfrac{\pi}{12}\right)$

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