Предмет: Математика, автор: karina901

какая из функций является четной: А. y=2cosx; B. y=1,5sinx; C. y=x; D. y=tgx?

Ответы

Автор ответа: iceman5

ответ А , потому что всегда cos(-x) равняетсЯ cosx

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