Для нахождения косинуса угла α, используем тригонометрическое тождество:
tg^2(α) = 1 - cos^2(α)
11/60 = sin(α) / cos(α)
cos(α) = sin(α) / (11/60)
sin^2(α) = 1 - cos^2(α)
sin^2(α) = 1 - (sin(α) / (11/60))^2
sin^2(α) = 1 - (sin(α))^2 * (60/11)^2
sin^2(α) = 1 - sin^2(α) * 3600 / 121
121 sin^2(α) = 121 - 3600 sin^2(α)
482 * sin^2(α) = 121
sin^2(α) = 121 / 482
sin^2(α) = 0.25104
sin(α) ≈ 0.5
cos(α) = sin(α) / (11/60) ≈ 0.5 / (11/60) = 0.5 * 60 / 11 = 30 / 11 ≈ 2.72727272727
Для нахождения косинуса угла α, используем тригонометрическое тождество:
tg^2(α) = 1 - cos^2(α)
11/60 = sin(α) / cos(α)
cos(α) = sin(α) / (11/60)
sin^2(α) = 1 - cos^2(α)
sin^2(α) = 1 - (sin(α) / (11/60))^2
sin^2(α) = 1 - (sin(α))^2 * (60/11)^2
sin^2(α) = 1 - sin^2(α) * 3600 / 121
121 sin^2(α) = 121 - 3600 sin^2(α)
482 * sin^2(α) = 121
sin^2(α) = 121 / 482
sin^2(α) = 0.25104
sin(α) ≈ 0.5
cos(α) = sin(α) / (11/60) ≈ 0.5 / (11/60) = 0.5 * 60 / 11 = 30 / 11 ≈ 2.72727272727