Дано:cos(α) = 1/4
Используем тригонометрическое тождество:sin^2(α) + cos^2(α) = 1
sin^2(α) + (1/4)^2 = 1sin^2(α) + 1/16 = 1sin^2(α) = 15/16sin(α) = √(15)/4
tg(α) = sin(α) / cos(α) = (√(15)/4) / (1/4) = √(15)
ctg(α) = 1 / tg(α) = 1 / √(15)
Дано:
cos(α) = 1/4
Используем тригонометрическое тождество:
sin^2(α) + cos^2(α) = 1
sin^2(α) + (1/4)^2 = 1
sin^2(α) + 1/16 = 1
sin^2(α) = 15/16
sin(α) = √(15)/4
tg(α) = sin(α) / cos(α) = (√(15)/4) / (1/4) = √(15)
ctg(α) = 1 / tg(α) = 1 / √(15)