http://lenka-l.livejournal.com/ ([identity profile] lenka-l.livejournal.com) wrote in [personal profile] noa_anuta 2009-02-08 01:22 pm (UTC)

Так в тригонометрии тоже есть азы и "не азы". Например, теорема Пифагора это азы тригонометрии. Очень полезная теорема в повседневной жизни.
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