Предмет: Алгебра, автор: Artem32481

сколько равно и как решить sin740,cos 560, cos225 градусов

Ответы

Автор ответа: sedinalana

sin740=sin(720+20)=sin20
cos560=cos(360+200)=cos200=cos(180+20)=-cos20
cos225=cos(180+45)=-cos45=-√2/2

Автор ответа: Artem32481

3 неправельно

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