Date: 2017-02-21 09:13 pm (UTC)
From: [identity profile] knop.livejournal.com
Задачу отмеченную (Киселев, Очеретянский, 1988) давали мне на экзамене в 1983.
Моему другу в том же году дали задачу "Найти сумму
lg tg 1 + lg tg 2 + ... + lg tg 89
(углы в градусах).
Экзаменаторов своих я, увы, не помню, хотя, возможно, один из них был Евтушик)
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