Предмет: Математика, автор: bdfd

вычислить cos(2arcsin1/3)

Ответы

Автор ответа: ludmilagena

cos(2arcsin1/3) = 1 - sin²(arcsin1/3) = 1 - 2*(1/3)² = 1-2/9 = 7/9

bdfd: спасибо большое

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