Compute
\[\cos \frac{2 \pi}{7} \cos \frac{4 \pi}{7} \cos \frac{8 \pi}{7}.\]
Question:
Compute
\[\cos \frac{2 \pi}{7} \cos \frac{4 \pi}{7} \cos \frac{8 \pi}{7}.\]
Answer:
Let's think step by step.

user
\frac{1}{8}
Compute
\[\cos \frac{2 \pi}{7} \cos \frac{4 \pi}{7} \cos \frac{8 \pi}{7}.\]
train