Question

Помогите !!! Срочно надо ответ

Answer 1

sin(α+π/2)* cos(α-π)* tg(-α) / (sin(α-π) * cos(α- 3π/2) * ctg(α-π)) = cos α * (-cos α) * (-tg α) / ( sin α * (-sin α) * (-ctg α) = cos α * sin α / (sin α * cos α) = 1