Let $a$ and $b$ be nonnegative real numbers such that
\[\sin (ax + b) = \sin 29x\]for all integers $x.$  Find the smallest possible value of $a.$
Question:
Let $a$ and $b$ be nonnegative real numbers such that
\[\sin (ax + b) = \sin 29x\]for all integers $x.$  Find the smallest possible value of $a.$
Answer:
Let's think step by step.

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10 \pi - 29
Let $a$ and $b$ be nonnegative real numbers such that
\[\sin (ax + b) = \sin 29x\]for all integers $x.$  Find the smallest possible value of $a.$
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