Question

найдите sind и tgd, если cosd =0.6 ,0 *<d <90*   

Answer 1

$sind= sqrt{1-cos ^{2} d} = sqrt{1-0,6 ^{2} } = sqrt{0,64} =0,8 \ tgd= frac{sind}{cosd} = frac{0,8}{0,6} = frac{8}{6} = frac{4}{3}$