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Ορισμός του π και του ακτινίου, μελέτη του ημιτόνου και του συνημιτόνου για γωνίες μεταξύ 0 και 2π (παράγραφοι 3.1-3.3 του σχολικού βιβλίου.)
Δες τα Φύλλα Εργασίας στο:[url]http://blogs.sch.gr/na2074ta/2014/11/01/%CF%84%CF%81%CE%B9%CE%B3%CF%89%CE%BD%CE%BF%CE%BC%CE%B5%CF%84%CF%81%CE%B9%CE%B1-%CE%B2%CE%84-%CE%BB%CF%85%CE%BA%CE%B5%CE%B9%CE%BF%CF%85-%CF%86%CF%85%CE%BB%CE%BB%CE%B1-%CE%B5%CF%81%CE%B3%CE%B1%CF%83/[/url]