ext_842961: (0)
http://mamlas.livejournal.com/ ([identity profile] mamlas.livejournal.com) wrote in [community profile] eto_fake 2012-07-18 12:52 am (UTC)

Да, я знаю про тангенс. Читал разбор этой задачи раньше. Но визуально не верю до сих пор. Так и хочется крикнуть - Это иллюзия! )
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