можно лучшим?
cos(8 × π) / 7 × cos(π) / 7 × sin(8 × π) / 7 × sin(π) / 7 =
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можно лучшим?
cos(8 × π) / 7 × cos(π) / 7 × sin(8 × π) / 7 × sin(π) / 7 =