wiedząc ze cos = ¹/₁₀ oblicz pozostałe funkcje
cos=1/10
sin²α+cos²α=1
sin²α+(1/10)²=1
sin²α+1/100=1
sin²α=1-1/100
sin²α=0,99
sinα=√(99/100)= (3√11)/10
tgα=sinα/cosα=(3√11)/10 : 1/10 =(3√11)/10 · 10 = 3√11
ctgα=cosα/sinα= (1/10) /(3√11/10)= 1/10 · 10/(3√11)=1/(3√11)= √11/33
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cos=1/10
sin²α+cos²α=1
sin²α+(1/10)²=1
sin²α+1/100=1
sin²α=1-1/100
sin²α=0,99
sinα=√(99/100)= (3√11)/10
tgα=sinα/cosα=(3√11)/10 : 1/10 =(3√11)/10 · 10 = 3√11
ctgα=cosα/sinα= (1/10) /(3√11/10)= 1/10 · 10/(3√11)=1/(3√11)= √11/33