Формулы суммы и разности двух углов
sin(α + β) = sinα * cosβ + sinβ * cosα
sin(α - β) = sinα * cosβ - sinβ * cosα
cos(α + β) = cosα * cosβ - sinα * sinβ
cos(α - β) = cosα * cosβ + sinα * sinβ
tg(α + β) =
tg(α - β) =
ctg(α + β) =
ctg(α - β) =
Вопросы к конспектам
ctg15° = ?
tg75° =?
Вычислить: sin15° = ?
Вычислить: cos15° + sin15° · ctg30° = ?
Упростите: 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Последнее изменение: Воскресенье, 29 Январь 2017, 23:33