Предмет: Алгебра, автор: lina16mgstar

Помогите два этих примера решить, пожалуйста

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Автор ответа: aaakamilaaa

0

Ответ:

3. -cos(19π/10)tg(π/10)-sin(8π/5)ctg(2π/5)=0

4. хз

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