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Trigonometri_teori_mundtlig fremlaeggelse-2012-03-07.pdf
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Wikipedia on Twitter: "Hypnotic math eye candy showing unit circle, sine and cosine. By Wiki Commons user LucasVB. https://t.co/XiwunDCxdW https://t.co/BVFkr3GwK6" / Twitter
Sinus, cosinus og tangens — TSBF
Trigonometric functions - Wikipedia
Trigonometrisk funksjon - Wikiwand
