Channel: Education Channel
Related tags: Critical Thinking ,
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Channel: Education Channel
Related tags: Critical Thinking ,
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![Identità goniometriche: sin(45°-α) cos(45° α)=[√2cos(2α)]/[cos(α) sin(α)]](http://video.territorioscuola.com/media/thumbs/identita-goniometriche-sin45-cos452cos2-cossinsun-08-sep-13-133530-0200.png)
