February 2019 0 212 Report
Dany jest kat ostry alfa taki, ze tg (90 - alfa) = 1/2. Wowczas: A. sin alfa = 2pierwiastek 5/5 B. sin alfa = pierw. 5/5 c. sin alfa= perw.3/2 d. sin alfa = 1/5 z objaśnieniem

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