Формулы:
sin^2=1-cos^2
tg = sin(a)/cos(a)
ctg = cos(a)/sin(a)
sqrt - Квадратный корень
sin = sqrt(1-(5/17^2)) = sqrt ( 1 - 25/289) = sqrt(264/289)
tg = sqrt(264/289) / 5/17
ctg = 5/17 / sqrt(264/289)
Формулы:
sin^2=1-cos^2
tg = sin(a)/cos(a)
ctg = cos(a)/sin(a)
sqrt - Квадратный корень
sin = sqrt(1-(5/17^2)) = sqrt ( 1 - 25/289) = sqrt(264/289)
tg = sqrt(264/289) / 5/17
ctg = 5/17 / sqrt(264/289)