Question

cosx=0,6; 0<x<Пи/2
найти sinx, tgx, ctgx

Answer 1

x∈I
$cosx=0.6 \ sinx= sqrt{1-0.36} = sqrt{0.64} =0.8 \ tgx= frac{sinx}{cosx} = frac{0.8}{0.6} = frac{8}{6} = frac{4}{3} =1 frac{1}{3} \ ctgx= frac{1}{tgx} = frac{1}{ frac{4}{3} } = frac{3}{4}$