Oblicz wartość pozostałych funkcji trygonometrycznych kąta ostrego alfa,gdy sin alfa = 12/13
sin²α + cos²α=1
sin α=12/13
sin²α+cos²α=1
cos²α=1-sin²α
cos²α=1-(12/13)²
cos²α=1-(144/169)
cos²α=25/169
cosα=√25/169=5/13
tgα=12/5=2,4
ctgα=5/12
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sin²α + cos²α=1
sin α=12/13
sin²α+cos²α=1
cos²α=1-sin²α
cos²α=1-(12/13)²
cos²α=1-(144/169)
cos²α=25/169
cosα=√25/169=5/13
tgα=12/5=2,4
ctgα=5/12