$ABCDE$ is inscribed in a circle with $AB = BC = CD = DE = 4$ and $AE = 1.$  Compute $(1 - \cos \angle B)(1 - \cos \angle ACE).$
Question:
$ABCDE$ is inscribed in a circle with $AB = BC = CD = DE = 4$ and $AE = 1.$  Compute $(1 - \cos \angle B)(1 - \cos \angle ACE).$
Answer:
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$ABCDE$ is inscribed in a circle with $AB = BC = CD = DE = 4$ and $AE = 1.$  Compute $(1 - \cos \angle B)(1 - \cos \angle ACE).$
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