Предмет: Алгебра, автор: kenzhegulovaas

sin3d-sind:cos3d-cosd=


barmaglote: непонятно, 3 - это степень или множитель перед альфа
kenzhegulovaas: множитель перед альфа пожалуиста помогите!
Мистэр: делится только на cos3d или на cos3d-cosd
Мистэр: ну я так понял что тут на все делится. Надо в скобки брать если на все делится
kenzhegulovaas: делиться на cos3d-cosd
Мистэр: там либо опечатка либо ты неправильно записала. в решении вроде все верно. пересмотрел несколько раз))

Ответы

Автор ответа: Мистэр
3
2sin((3d-d)/2)cos((3d+d)/2)/(-2sin((3d-d)/2)sin((3d-d)/2))
в результате отнимания и деления получается: 
2sind cos2d/(-2sind sin2d)= -cos2d/sin2d=-ctg2d


kenzhegulovaas: простите но мне нужно доказать что ответ должно быть tg2d))
Мистэр: ща пересмотрю решение))
kenzhegulovaas: спасибо!
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